21052199

素因数分解:

$7^1\times {\mathrm{23}}^1\times {\mathrm{229}}^1\times {\mathrm{571}}^1$

素因数の和:830

約数の個数: 16

約数和(自身を含む): 25259520

約数和(自身を除く): 4207321

約数列:

[1, 7, 23, 161, 229, 571, 1603, 3997, 5267, 13133, 36869, 91931, 130759, 915313, 3007457, 21052199]

約数ペア:

[(1, 21052199), (7, 3007457), (23, 915313), (161, 130759), (229, 91931), (571, 36869), (1603, 13133), (3997, 5267)]