21317491

素因数分解:

${\mathrm{13}}^3\times {\mathrm{31}}^1\times {\mathrm{313}}^1$

素因数の和:383

約数の個数: 16

約数和(自身を含む): 23914240

約数和(自身を除く): 2596749

約数列:

[1, 13, 31, 169, 313, 403, 2197, 4069, 5239, 9703, 52897, 68107, 126139, 687661, 1639807, 21317491]

約数ペア:

[(1, 21317491), (13, 1639807), (31, 687661), (169, 126139), (313, 68107), (403, 52897), (2197, 9703), (4069, 5239)]