21371405

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{29}}^1\times {\mathrm{13399}}^1$

素因数の和:13444

約数の個数: 16

約数和(自身を含む): 28944000

約数和(自身を除く): 7572595

約数列:

[1, 5, 11, 29, 55, 145, 319, 1595, 13399, 66995, 147389, 388571, 736945, 1942855, 4274281, 21371405]

約数ペア:

[(1, 21371405), (5, 4274281), (11, 1942855), (29, 736945), (55, 388571), (145, 147389), (319, 66995), (1595, 13399)]