391159240

素因数分解:

$2^3\times 5^1\times {\mathrm{31}}^1\times {\mathrm{315451}}^1$

素因数の和:315493

約数の個数: 32

約数和(自身を含む): 908501760

約数和(自身を除く): 517342520

約数列:

[1, 2, 4, 5, 8, 10, 20, 31, 40, 62, 124, 155, 248, 310, 620, 1240, 315451, 630902, 1261804, 1577255, 2523608, 3154510, 6309020, 9778981, 12618040, 19557962, 39115924, 48894905, 78231848, 97789810, 195579620, 391159240]

約数ペア:

[(1, 391159240), (2, 195579620), (4, 97789810), (5, 78231848), (8, 48894905), (10, 39115924), (20, 19557962), (31, 12618040), (40, 9778981), (62, 6309020), (124, 3154510), (155, 2523608), (248, 1577255), (310, 1261804), (620, 630902), (1240, 315451)]