21906340

素因数分解:

$2^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{15427}}^1$

素因数の和:15507

約数の個数: 24

約数和(自身を含む): 46654272

約数和(自身を除く): 24747932

約数列:

[1, 2, 4, 5, 10, 20, 71, 142, 284, 355, 710, 1420, 15427, 30854, 61708, 77135, 154270, 308540, 1095317, 2190634, 4381268, 5476585, 10953170, 21906340]

約数ペア:

[(1, 21906340), (2, 10953170), (4, 5476585), (5, 4381268), (10, 2190634), (20, 1095317), (71, 308540), (142, 154270), (284, 77135), (355, 61708), (710, 30854), (1420, 15427)]