21306715

素因数分解:

$5^1\times {\mathrm{43}}^1\times {\mathrm{113}}^1\times {\mathrm{877}}^1$

素因数の和:1038

約数の個数: 16

約数和(自身を含む): 26424288

約数和(自身を除く): 5117573

約数列:

[1, 5, 43, 113, 215, 565, 877, 4385, 4859, 24295, 37711, 99101, 188555, 495505, 4261343, 21306715]

約数ペア:

[(1, 21306715), (5, 4261343), (43, 495505), (113, 188555), (215, 99101), (565, 37711), (877, 24295), (4385, 4859)]