81655240

素因数分解:

$2^3\times 5^1\times {\mathrm{31}}^1\times {\mathrm{65851}}^1$

素因数の和:65893

約数の個数: 32

約数和(自身を含む): 189653760

約数和(自身を除く): 107998520

約数列:

[1, 2, 4, 5, 8, 10, 20, 31, 40, 62, 124, 155, 248, 310, 620, 1240, 65851, 131702, 263404, 329255, 526808, 658510, 1317020, 2041381, 2634040, 4082762, 8165524, 10206905, 16331048, 20413810, 40827620, 81655240]

約数ペア:

[(1, 81655240), (2, 40827620), (4, 20413810), (5, 16331048), (8, 10206905), (10, 8165524), (20, 4082762), (31, 2634040), (40, 2041381), (62, 1317020), (124, 658510), (155, 526808), (248, 329255), (310, 263404), (620, 131702), (1240, 65851)]