21670025

素因数分解:

$5^2\times {\mathrm{13}}^2\times {\mathrm{23}}^1\times {\mathrm{223}}^1$

素因数の和:282

約数の個数: 36

約数和(自身を含む): 30498048

約数和(自身を除く): 8828023

約数列:

[1, 5, 13, 23, 25, 65, 115, 169, 223, 299, 325, 575, 845, 1115, 1495, 2899, 3887, 4225, 5129, 5575, 7475, 14495, 19435, 25645, 37687, 66677, 72475, 97175, 128225, 188435, 333385, 866801, 942175, 1666925, 4334005, 21670025]

約数ペア:

[(1, 21670025), (5, 4334005), (13, 1666925), (23, 942175), (25, 866801), (65, 333385), (115, 188435), (169, 128225), (223, 97175), (299, 72475), (325, 66677), (575, 37687), (845, 25645), (1115, 19435), (1495, 14495), (2899, 7475), (3887, 5575), (4225, 5129)]