81256580

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{131059}}^1$

素因数の和:131099

約数の個数: 24

約数和(自身を含む): 176144640

約数和(自身を除く): 94888060

約数列:

[1, 2, 4, 5, 10, 20, 31, 62, 124, 155, 310, 620, 131059, 262118, 524236, 655295, 1310590, 2621180, 4062829, 8125658, 16251316, 20314145, 40628290, 81256580]

約数ペア:

[(1, 81256580), (2, 40628290), (4, 20314145), (5, 16251316), (10, 8125658), (20, 4062829), (31, 2621180), (62, 1310590), (124, 655295), (155, 524236), (310, 262118), (620, 131059)]