21268885

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{20353}}^1$

素因数の和:20388

約数の個数: 16

約数和(自身を含む): 29309760

約数和(自身を除く): 8040875

約数列:

[1, 5, 11, 19, 55, 95, 209, 1045, 20353, 101765, 223883, 386707, 1119415, 1933535, 4253777, 21268885]

約数ペア:

[(1, 21268885), (5, 4253777), (11, 1933535), (19, 1119415), (55, 386707), (95, 223883), (209, 101765), (1045, 20353)]