21537405

素因数分解:

$3^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{15439}}^1$

素因数の和:15481

約数の個数: 24

約数和(自身を含む): 38538240

約数和(自身を除く): 17000835

約数列:

[1, 3, 5, 9, 15, 31, 45, 93, 155, 279, 465, 1395, 15439, 46317, 77195, 138951, 231585, 478609, 694755, 1435827, 2393045, 4307481, 7179135, 21537405]

約数ペア:

[(1, 21537405), (3, 7179135), (5, 4307481), (9, 2393045), (15, 1435827), (31, 694755), (45, 478609), (93, 231585), (155, 138951), (279, 77195), (465, 46317), (1395, 15439)]