21295491

素因数分解:

$3^1\times 7^1\times {\mathrm{131}}^1\times {\mathrm{7741}}^1$

素因数の和:7882

約数の個数: 16

約数和(自身を含む): 32702208

約数和(自身を除く): 11406717

約数列:

[1, 3, 7, 21, 131, 393, 917, 2751, 7741, 23223, 54187, 162561, 1014071, 3042213, 7098497, 21295491]

約数ペア:

[(1, 21295491), (3, 7098497), (7, 3042213), (21, 1014071), (131, 162561), (393, 54187), (917, 23223), (2751, 7741)]