21801780

素因数分解:

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

素因数の和:68

約数の個数: 288

約数和(自身を含む): 89526528

約数和(自身を除く): 67724748

約数列:

[1, 2, 3, 4, 5, 6, 7, 9, 10, 11, 12, 13, 14, 15, 18, 20, 21, 22, 26, 28, 30, 33, 35, 36, 39, 42, 44, 45, 52, 55, 60, 63, 65, 66, 70, 77, 78, 84, 90, 91, 99, 105, 110, 117, 121, 126, 130, 132, 140, 143, 154, 156, 165, 180, 182, 195, 198, 210, 220, 231, 234, 242, 252, 260, 273, 286, 308, 315, 330, 363, 364, 385, 390, 396, 420, 429, 455, 462, 468, 484, 495, 546, 572, 585, 605, 630, 660, 693, 715, 726, 770, 780, 819, 847, 858, 910, 924, 990, 1001, 1089, 1092, 1155, 1170, 1210, 1260, 1287, 1331, 1365, 1386, 1430, 1452, 1540, 1573, 1638, 1694, 1716, 1815, 1820, 1980, 2002, 2145, 2178, 2310, 2340, 2420, 2541, 2574, 2662, 2730, 2772, 2860, 3003, 3146, 3276, 3388, 3465, 3630, 3993, 4004, 4095, 4235, 4290, 4356, 4620, 4719, 5005, 5082, 5148, 5324, 5445, 5460, 6006, 6292, 6435, 6655, 6930, 7260, 7623, 7865, 7986, 8190, 8470, 8580, 9009, 9317, 9438, 10010, 10164, 10890, 11011, 11979, 12012, 12705, 12870, 13310, 13860, 14157, 15015, 15246, 15730, 15972, 16380, 16940, 17303, 18018, 18634, 18876, 19965, 20020, 21780, 22022, 23595, 23958, 25410, 25740, 26620, 27951, 28314, 30030, 30492, 31460, 33033, 34606, 36036, 37268, 38115, 39930, 44044, 45045, 46585, 47190, 47916, 50820, 51909, 55055, 55902, 56628, 59895, 60060, 66066, 69212, 70785, 76230, 79860, 83853, 86515, 90090, 93170, 94380, 99099, 103818, 110110, 111804, 119790, 121121, 132132, 139755, 141570, 152460, 155727, 165165, 167706, 173030, 180180, 186340, 198198, 207636, 220220, 239580, 242242, 259545, 279510, 283140, 311454, 330330, 335412, 346060, 363363, 396396, 419265, 484484, 495495, 519090, 559020, 605605, 622908, 660660, 726726, 778635, 838530, 990990, 1038180, 1090089, 1211210, 1453452, 1557270, 1677060, 1816815, 1981980, 2180178, 2422420, 3114540, 3633630, 4360356, 5450445, 7267260, 10900890, 21801780]

約数ペア:

[(1, 21801780), (2, 10900890), (3, 7267260), (4, 5450445), (5, 4360356), (6, 3633630), (7, 3114540), (9, 2422420), (10, 2180178), (11, 1981980), (12, 1816815), (13, 1677060), (14, 1557270), (15, 1453452), (18, 1211210), (20, 1090089), (21, 1038180), (22, 990990), (26, 838530), (28, 778635), (30, 726726), (33, 660660), (35, 622908), (36, 605605), (39, 559020), (42, 519090), (44, 495495), (45, 484484), (52, 419265), (55, 396396), (60, 363363), (63, 346060), (65, 335412), (66, 330330), (70, 311454), (77, 283140), (78, 279510), (84, 259545), (90, 242242), (91, 239580), (99, 220220), (105, 207636), (110, 198198), (117, 186340), (121, 180180), (126, 173030), (130, 167706), (132, 165165), (140, 155727), (143, 152460), (154, 141570), (156, 139755), (165, 132132), (180, 121121), (182, 119790), (195, 111804), (198, 110110), (210, 103818), (220, 99099), (231, 94380), (234, 93170), (242, 90090), (252, 86515), (260, 83853), (273, 79860), (286, 76230), (308, 70785), (315, 69212), (330, 66066), (363, 60060), (364, 59895), (385, 56628), (390, 55902), (396, 55055), (420, 51909), (429, 50820), (455, 47916), (462, 47190), (468, 46585), (484, 45045), (495, 44044), (546, 39930), (572, 38115), (585, 37268), (605, 36036), (630, 34606), (660, 33033), (693, 31460), (715, 30492), (726, 30030), (770, 28314), (780, 27951), (819, 26620), (847, 25740), (858, 25410), (910, 23958), (924, 23595), (990, 22022), (1001, 21780), (1089, 20020), (1092, 19965), (1155, 18876), (1170, 18634), (1210, 18018), (1260, 17303), (1287, 16940), (1331, 16380), (1365, 15972), (1386, 15730), (1430, 15246), (1452, 15015), (1540, 14157), (1573, 13860), (1638, 13310), (1694, 12870), (1716, 12705), (1815, 12012), (1820, 11979), (1980, 11011), (2002, 10890), (2145, 10164), (2178, 10010), (2310, 9438), (2340, 9317), (2420, 9009), (2541, 8580), (2574, 8470), (2662, 8190), (2730, 7986), (2772, 7865), (2860, 7623), (3003, 7260), (3146, 6930), (3276, 6655), (3388, 6435), (3465, 6292), (3630, 6006), (3993, 5460), (4004, 5445), (4095, 5324), (4235, 5148), (4290, 5082), (4356, 5005), (4620, 4719)]