81536920

素因数分解:

$2^3\times 5^1\times {\mathrm{137}}^1\times {\mathrm{14879}}^1$

素因数の和:15027

約数の個数: 32

約数和(自身を含む): 184809600

約数和(自身を除く): 103272680

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 137, 274, 548, 685, 1096, 1370, 2740, 5480, 14879, 29758, 59516, 74395, 119032, 148790, 297580, 595160, 2038423, 4076846, 8153692, 10192115, 16307384, 20384230, 40768460, 81536920]

約数ペア:

[(1, 81536920), (2, 40768460), (4, 20384230), (5, 16307384), (8, 10192115), (10, 8153692), (20, 4076846), (40, 2038423), (137, 595160), (274, 297580), (548, 148790), (685, 119032), (1096, 74395), (1370, 59516), (2740, 29758), (5480, 14879)]