21218890

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{1621}}^1$

素因数の和:1663

約数の個数: 64

約数和(自身を含む): 50450688

約数和(自身を除く): 29231798

約数列:

[1, 2, 5, 7, 10, 11, 14, 17, 22, 34, 35, 55, 70, 77, 85, 110, 119, 154, 170, 187, 238, 374, 385, 595, 770, 935, 1190, 1309, 1621, 1870, 2618, 3242, 6545, 8105, 11347, 13090, 16210, 17831, 22694, 27557, 35662, 55114, 56735, 89155, 113470, 124817, 137785, 178310, 192899, 249634, 275570, 303127, 385798, 606254, 624085, 964495, 1248170, 1515635, 1928990, 2121889, 3031270, 4243778, 10609445, 21218890]

約数ペア:

[(1, 21218890), (2, 10609445), (5, 4243778), (7, 3031270), (10, 2121889), (11, 1928990), (14, 1515635), (17, 1248170), (22, 964495), (34, 624085), (35, 606254), (55, 385798), (70, 303127), (77, 275570), (85, 249634), (110, 192899), (119, 178310), (154, 137785), (170, 124817), (187, 113470), (238, 89155), (374, 56735), (385, 55114), (595, 35662), (770, 27557), (935, 22694), (1190, 17831), (1309, 16210), (1621, 13090), (1870, 11347), (2618, 8105), (3242, 6545)]