21455161

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{12409}}^1$

素因数の和:12448

約数の個数: 16

約数和(自身を含む): 27798400

約数和(自身を除く): 6343239

約数列:

[1, 7, 13, 19, 91, 133, 247, 1729, 12409, 86863, 161317, 235771, 1129219, 1650397, 3065023, 21455161]

約数ペア:

[(1, 21455161), (7, 3065023), (13, 1650397), (19, 1129219), (91, 235771), (133, 161317), (247, 86863), (1729, 12409)]