81112120

素因数分解:

$2^3\times 5^1\times {\mathrm{31}}^1\times {\mathrm{65413}}^1$

素因数の和:65455

約数の個数: 32

約数和(自身を含む): 188392320

約数和(自身を除く): 107280200

約数列:

[1, 2, 4, 5, 8, 10, 20, 31, 40, 62, 124, 155, 248, 310, 620, 1240, 65413, 130826, 261652, 327065, 523304, 654130, 1308260, 2027803, 2616520, 4055606, 8111212, 10139015, 16222424, 20278030, 40556060, 81112120]

約数ペア:

[(1, 81112120), (2, 40556060), (4, 20278030), (5, 16222424), (8, 10139015), (10, 8111212), (20, 4055606), (31, 2616520), (40, 2027803), (62, 1308260), (124, 654130), (155, 523304), (248, 327065), (310, 261652), (620, 130826), (1240, 65413)]