21157591

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{5407}}^1$

素因数の和:5470

約数の個数: 16

約数和(自身を含む): 26650624

約数和(自身を除く): 5493033

約数列:

[1, 7, 13, 43, 91, 301, 559, 3913, 5407, 37849, 70291, 232501, 492037, 1627507, 3022513, 21157591]

約数ペア:

[(1, 21157591), (7, 3022513), (13, 1627507), (43, 492037), (91, 232501), (301, 70291), (559, 37849), (3913, 5407)]