21939940

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{3217}}^1$

素因数の和:3268

約数の個数: 48

約数和(自身を含む): 51899904

約数和(自身を除く): 29959964

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 31, 44, 55, 62, 110, 124, 155, 220, 310, 341, 620, 682, 1364, 1705, 3217, 3410, 6434, 6820, 12868, 16085, 32170, 35387, 64340, 70774, 99727, 141548, 176935, 199454, 353870, 398908, 498635, 707740, 997270, 1096997, 1994540, 2193994, 4387988, 5484985, 10969970, 21939940]

約数ペア:

[(1, 21939940), (2, 10969970), (4, 5484985), (5, 4387988), (10, 2193994), (11, 1994540), (20, 1096997), (22, 997270), (31, 707740), (44, 498635), (55, 398908), (62, 353870), (110, 199454), (124, 176935), (155, 141548), (220, 99727), (310, 70774), (341, 64340), (620, 35387), (682, 32170), (1364, 16085), (1705, 12868), (3217, 6820), (3410, 6434)]