78509980

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{139}}^1\times {\mathrm{911}}^1$

素因数の和:1090

約数の個数: 48

約数和(自身を含む): 171601920

約数和(自身を除く): 93091940

約数列:

[1, 2, 4, 5, 10, 20, 31, 62, 124, 139, 155, 278, 310, 556, 620, 695, 911, 1390, 1822, 2780, 3644, 4309, 4555, 8618, 9110, 17236, 18220, 21545, 28241, 43090, 56482, 86180, 112964, 126629, 141205, 253258, 282410, 506516, 564820, 633145, 1266290, 2532580, 3925499, 7850998, 15701996, 19627495, 39254990, 78509980]

約数ペア:

[(1, 78509980), (2, 39254990), (4, 19627495), (5, 15701996), (10, 7850998), (20, 3925499), (31, 2532580), (62, 1266290), (124, 633145), (139, 564820), (155, 506516), (278, 282410), (310, 253258), (556, 141205), (620, 126629), (695, 112964), (911, 86180), (1390, 56482), (1822, 43090), (2780, 28241), (3644, 21545), (4309, 18220), (4555, 17236), (8618, 9110)]