81993665

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{103}}^1\times {\mathrm{331}}^1$

素因数の和:489

約数の個数: 32

約数和(自身を含む): 110213376

約数和(自身を除く): 28219711

約数列:

[1, 5, 13, 37, 65, 103, 185, 331, 481, 515, 1339, 1655, 2405, 3811, 4303, 6695, 12247, 19055, 21515, 34093, 49543, 61235, 159211, 170465, 247715, 443209, 796055, 1261441, 2216045, 6307205, 16398733, 81993665]

約数ペア:

[(1, 81993665), (5, 16398733), (13, 6307205), (37, 2216045), (65, 1261441), (103, 796055), (185, 443209), (331, 247715), (481, 170465), (515, 159211), (1339, 61235), (1655, 49543), (2405, 34093), (3811, 21515), (4303, 19055), (6695, 12247)]