21493780

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{821}}^1$

素因数の和:865

約数の個数: 96

約数和(自身を含む): 59657472

約数和(自身を除く): 38163692

約数列:

[1, 2, 4, 5, 7, 10, 11, 14, 17, 20, 22, 28, 34, 35, 44, 55, 68, 70, 77, 85, 110, 119, 140, 154, 170, 187, 220, 238, 308, 340, 374, 385, 476, 595, 748, 770, 821, 935, 1190, 1309, 1540, 1642, 1870, 2380, 2618, 3284, 3740, 4105, 5236, 5747, 6545, 8210, 9031, 11494, 13090, 13957, 16420, 18062, 22988, 26180, 27914, 28735, 36124, 45155, 55828, 57470, 63217, 69785, 90310, 97699, 114940, 126434, 139570, 153527, 180620, 195398, 252868, 279140, 307054, 316085, 390796, 488495, 614108, 632170, 767635, 976990, 1074689, 1264340, 1535270, 1953980, 2149378, 3070540, 4298756, 5373445, 10746890, 21493780]

約数ペア:

[(1, 21493780), (2, 10746890), (4, 5373445), (5, 4298756), (7, 3070540), (10, 2149378), (11, 1953980), (14, 1535270), (17, 1264340), (20, 1074689), (22, 976990), (28, 767635), (34, 632170), (35, 614108), (44, 488495), (55, 390796), (68, 316085), (70, 307054), (77, 279140), (85, 252868), (110, 195398), (119, 180620), (140, 153527), (154, 139570), (170, 126434), (187, 114940), (220, 97699), (238, 90310), (308, 69785), (340, 63217), (374, 57470), (385, 55828), (476, 45155), (595, 36124), (748, 28735), (770, 27914), (821, 26180), (935, 22988), (1190, 18062), (1309, 16420), (1540, 13957), (1642, 13090), (1870, 11494), (2380, 9031), (2618, 8210), (3284, 6545), (3740, 5747), (4105, 5236)]