820459640

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{661}}^1$

素因数の和:734

約数の個数: 256

約数和(自身を含む): 2562416640

約数和(自身を除く): 1741957000

約数列:

[1, 2, 4, 5, 7, 8, 10, 11, 13, 14, 20, 22, 26, 28, 31, 35, 40, 44, 52, 55, 56, 62, 65, 70, 77, 88, 91, 104, 110, 124, 130, 140, 143, 154, 155, 182, 217, 220, 248, 260, 280, 286, 308, 310, 341, 364, 385, 403, 434, 440, 455, 520, 572, 616, 620, 661, 682, 715, 728, 770, 806, 868, 910, 1001, 1085, 1144, 1240, 1322, 1364, 1430, 1540, 1612, 1705, 1736, 1820, 2002, 2015, 2170, 2387, 2644, 2728, 2821, 2860, 3080, 3224, 3305, 3410, 3640, 4004, 4030, 4340, 4433, 4627, 4774, 5005, 5288, 5642, 5720, 6610, 6820, 7271, 8008, 8060, 8593, 8680, 8866, 9254, 9548, 10010, 11284, 11935, 13220, 13640, 14105, 14542, 16120, 17186, 17732, 18508, 19096, 20020, 20491, 22165, 22568, 23135, 23870, 26440, 28210, 29084, 31031, 34372, 35464, 36355, 37016, 40040, 40982, 42965, 44330, 46270, 47740, 50897, 56420, 58168, 60151, 62062, 68744, 72710, 81964, 85930, 88660, 92540, 94523, 95480, 101794, 102455, 112840, 120302, 124124, 143437, 145420, 155155, 163928, 171860, 177320, 185080, 189046, 203588, 204910, 225401, 240604, 248248, 254485, 266383, 286874, 290840, 300755, 310310, 343720, 378092, 407176, 409820, 450802, 472615, 481208, 508970, 532766, 573748, 601510, 620620, 661661, 717185, 756184, 819640, 901604, 945230, 1017940, 1065532, 1127005, 1147496, 1203020, 1241240, 1323322, 1331915, 1434370, 1577807, 1803208, 1864681, 1890460, 2035880, 2131064, 2254010, 2406040, 2646644, 2663830, 2868740, 2930213, 3155614, 3308305, 3729362, 3780920, 4508020, 5293288, 5327660, 5737480, 5860426, 6311228, 6616610, 7458724, 7889035, 9016040, 9323405, 10655320, 11720852, 12622456, 13233220, 14651065, 14917448, 15778070, 18646810, 20511491, 23441704, 26466440, 29302130, 31556140, 37293620, 41022982, 58604260, 63112280, 74587240, 82045964, 102557455, 117208520, 164091928, 205114910, 410229820, 820459640]

約数ペア:

[(1, 820459640), (2, 410229820), (4, 205114910), (5, 164091928), (7, 117208520), (8, 102557455), (10, 82045964), (11, 74587240), (13, 63112280), (14, 58604260), (20, 41022982), (22, 37293620), (26, 31556140), (28, 29302130), (31, 26466440), (35, 23441704), (40, 20511491), (44, 18646810), (52, 15778070), (55, 14917448), (56, 14651065), (62, 13233220), (65, 12622456), (70, 11720852), (77, 10655320), (88, 9323405), (91, 9016040), (104, 7889035), (110, 7458724), (124, 6616610), (130, 6311228), (140, 5860426), (143, 5737480), (154, 5327660), (155, 5293288), (182, 4508020), (217, 3780920), (220, 3729362), (248, 3308305), (260, 3155614), (280, 2930213), (286, 2868740), (308, 2663830), (310, 2646644), (341, 2406040), (364, 2254010), (385, 2131064), (403, 2035880), (434, 1890460), (440, 1864681), (455, 1803208), (520, 1577807), (572, 1434370), (616, 1331915), (620, 1323322), (661, 1241240), (682, 1203020), (715, 1147496), (728, 1127005), (770, 1065532), (806, 1017940), (868, 945230), (910, 901604), (1001, 819640), (1085, 756184), (1144, 717185), (1240, 661661), (1322, 620620), (1364, 601510), (1430, 573748), (1540, 532766), (1612, 508970), (1705, 481208), (1736, 472615), (1820, 450802), (2002, 409820), (2015, 407176), (2170, 378092), (2387, 343720), (2644, 310310), (2728, 300755), (2821, 290840), (2860, 286874), (3080, 266383), (3224, 254485), (3305, 248248), (3410, 240604), (3640, 225401), (4004, 204910), (4030, 203588), (4340, 189046), (4433, 185080), (4627, 177320), (4774, 171860), (5005, 163928), (5288, 155155), (5642, 145420), (5720, 143437), (6610, 124124), (6820, 120302), (7271, 112840), (8008, 102455), (8060, 101794), (8593, 95480), (8680, 94523), (8866, 92540), (9254, 88660), (9548, 85930), (10010, 81964), (11284, 72710), (11935, 68744), (13220, 62062), (13640, 60151), (14105, 58168), (14542, 56420), (16120, 50897), (17186, 47740), (17732, 46270), (18508, 44330), (19096, 42965), (20020, 40982), (20491, 40040), (22165, 37016), (22568, 36355), (23135, 35464), (23870, 34372), (26440, 31031), (28210, 29084)]