81816440

素因数分解:

$2^3\times 5^1\times {\mathrm{31}}^1\times {\mathrm{65981}}^1$

素因数の和:66023

約数の個数: 32

約数和(自身を含む): 190028160

約数和(自身を除く): 108211720

約数列:

[1, 2, 4, 5, 8, 10, 20, 31, 40, 62, 124, 155, 248, 310, 620, 1240, 65981, 131962, 263924, 329905, 527848, 659810, 1319620, 2045411, 2639240, 4090822, 8181644, 10227055, 16363288, 20454110, 40908220, 81816440]

約数ペア:

[(1, 81816440), (2, 40908220), (4, 20454110), (5, 16363288), (8, 10227055), (10, 8181644), (20, 4090822), (31, 2639240), (40, 2045411), (62, 1319620), (124, 659810), (155, 527848), (248, 329905), (310, 263924), (620, 131962), (1240, 65981)]