21501480

素因数分解:

$2^3\times 3^1\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{179}}^1$

素因数の和:224

約数の個数: 256

約数和(自身を含む): 87091200

約数和(自身を除く): 65589720

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 11, 12, 13, 14, 15, 20, 21, 22, 24, 26, 28, 30, 33, 35, 39, 40, 42, 44, 52, 55, 56, 60, 65, 66, 70, 77, 78, 84, 88, 91, 104, 105, 110, 120, 130, 132, 140, 143, 154, 156, 165, 168, 179, 182, 195, 210, 220, 231, 260, 264, 273, 280, 286, 308, 312, 330, 358, 364, 385, 390, 420, 429, 440, 455, 462, 520, 537, 546, 572, 616, 660, 715, 716, 728, 770, 780, 840, 858, 895, 910, 924, 1001, 1074, 1092, 1144, 1155, 1253, 1320, 1365, 1430, 1432, 1540, 1560, 1716, 1790, 1820, 1848, 1969, 2002, 2145, 2148, 2184, 2310, 2327, 2506, 2685, 2730, 2860, 3003, 3080, 3432, 3580, 3640, 3759, 3938, 4004, 4290, 4296, 4620, 4654, 5005, 5012, 5370, 5460, 5720, 5907, 6006, 6265, 6981, 7160, 7518, 7876, 8008, 8580, 9240, 9308, 9845, 10010, 10024, 10740, 10920, 11635, 11814, 12012, 12530, 13783, 13962, 15015, 15036, 15752, 16289, 17160, 18616, 18795, 19690, 20020, 21480, 23270, 23628, 24024, 25060, 25597, 27566, 27924, 29535, 30030, 30072, 32578, 34905, 37590, 39380, 40040, 41349, 46540, 47256, 48867, 50120, 51194, 55132, 55848, 59070, 60060, 65156, 68915, 69810, 75180, 76791, 78760, 81445, 82698, 93080, 97734, 102388, 110264, 118140, 120120, 127985, 130312, 137830, 139620, 150360, 153582, 162890, 165396, 179179, 195468, 204776, 206745, 236280, 244335, 255970, 275660, 279240, 307164, 325780, 330792, 358358, 383955, 390936, 413490, 488670, 511940, 537537, 551320, 614328, 651560, 716716, 767910, 826980, 895895, 977340, 1023880, 1075074, 1433432, 1535820, 1653960, 1791790, 1954680, 2150148, 2687685, 3071640, 3583580, 4300296, 5375370, 7167160, 10750740, 21501480]

約数ペア:

[(1, 21501480), (2, 10750740), (3, 7167160), (4, 5375370), (5, 4300296), (6, 3583580), (7, 3071640), (8, 2687685), (10, 2150148), (11, 1954680), (12, 1791790), (13, 1653960), (14, 1535820), (15, 1433432), (20, 1075074), (21, 1023880), (22, 977340), (24, 895895), (26, 826980), (28, 767910), (30, 716716), (33, 651560), (35, 614328), (39, 551320), (40, 537537), (42, 511940), (44, 488670), (52, 413490), (55, 390936), (56, 383955), (60, 358358), (65, 330792), (66, 325780), (70, 307164), (77, 279240), (78, 275660), (84, 255970), (88, 244335), (91, 236280), (104, 206745), (105, 204776), (110, 195468), (120, 179179), (130, 165396), (132, 162890), (140, 153582), (143, 150360), (154, 139620), (156, 137830), (165, 130312), (168, 127985), (179, 120120), (182, 118140), (195, 110264), (210, 102388), (220, 97734), (231, 93080), (260, 82698), (264, 81445), (273, 78760), (280, 76791), (286, 75180), (308, 69810), (312, 68915), (330, 65156), (358, 60060), (364, 59070), (385, 55848), (390, 55132), (420, 51194), (429, 50120), (440, 48867), (455, 47256), (462, 46540), (520, 41349), (537, 40040), (546, 39380), (572, 37590), (616, 34905), (660, 32578), (715, 30072), (716, 30030), (728, 29535), (770, 27924), (780, 27566), (840, 25597), (858, 25060), (895, 24024), (910, 23628), (924, 23270), (1001, 21480), (1074, 20020), (1092, 19690), (1144, 18795), (1155, 18616), (1253, 17160), (1320, 16289), (1365, 15752), (1430, 15036), (1432, 15015), (1540, 13962), (1560, 13783), (1716, 12530), (1790, 12012), (1820, 11814), (1848, 11635), (1969, 10920), (2002, 10740), (2145, 10024), (2148, 10010), (2184, 9845), (2310, 9308), (2327, 9240), (2506, 8580), (2685, 8008), (2730, 7876), (2860, 7518), (3003, 7160), (3080, 6981), (3432, 6265), (3580, 6006), (3640, 5907), (3759, 5720), (3938, 5460), (4004, 5370), (4290, 5012), (4296, 5005), (4620, 4654)]