21237535

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{20323}}^1$

素因数の和:20358

約数の個数: 16

約数和(自身を含む): 29266560

約数和(自身を除く): 8029025

約数列:

[1, 5, 11, 19, 55, 95, 209, 1045, 20323, 101615, 223553, 386137, 1117765, 1930685, 4247507, 21237535]

約数ペア:

[(1, 21237535), (5, 4247507), (11, 1930685), (19, 1117765), (55, 386137), (95, 223553), (209, 101615), (1045, 20323)]