256943980

素因数分解:

$2^2\times 5^1\times {\mathrm{181}}^1\times {\mathrm{70979}}^1$

素因数の和:71169

約数の個数: 24

約数和(自身を含む): 542571120

約数和(自身を除く): 285627140

約数列:

[1, 2, 4, 5, 10, 20, 181, 362, 724, 905, 1810, 3620, 70979, 141958, 283916, 354895, 709790, 1419580, 12847199, 25694398, 51388796, 64235995, 128471990, 256943980]

約数ペア:

[(1, 256943980), (2, 128471990), (4, 64235995), (5, 51388796), (10, 25694398), (20, 12847199), (181, 1419580), (362, 709790), (724, 354895), (905, 283916), (1810, 141958), (3620, 70979)]