81113980

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{130829}}^1$

素因数の和:130869

約数の個数: 24

約数和(自身を含む): 175835520

約数和(自身を除く): 94721540

約数列:

[1, 2, 4, 5, 10, 20, 31, 62, 124, 155, 310, 620, 130829, 261658, 523316, 654145, 1308290, 2616580, 4055699, 8111398, 16222796, 20278495, 40556990, 81113980]

約数ペア:

[(1, 81113980), (2, 40556990), (4, 20278495), (5, 16222796), (10, 8111398), (20, 4055699), (31, 2616580), (62, 1308290), (124, 654145), (155, 523316), (310, 261658), (620, 130829)]