21258868

素因数分解:

$2^2\times {\mathrm{37}}^1\times {\mathrm{379}}^2$

素因数の和:799

約数の個数: 18

約数和(自身を含む): 38309586

約数和(自身を除く): 17050718

約数列:

[1, 2, 4, 37, 74, 148, 379, 758, 1516, 14023, 28046, 56092, 143641, 287282, 574564, 5314717, 10629434, 21258868]

約数ペア:

[(1, 21258868), (2, 10629434), (4, 5314717), (37, 574564), (74, 287282), (148, 143641), (379, 56092), (758, 28046), (1516, 14023)]