21858529

素因数分解:

$7^1\times {\mathrm{11}}^2\times {\mathrm{131}}^1\times {\mathrm{197}}^1$

素因数の和:357

約数の個数: 24

約数和(自身を含む): 27808704

約数和(自身を除く): 5950175

約数列:

[1, 7, 11, 77, 121, 131, 197, 847, 917, 1379, 1441, 2167, 10087, 15169, 15851, 23837, 25807, 110957, 166859, 180649, 283877, 1987139, 3122647, 21858529]

約数ペア:

[(1, 21858529), (7, 3122647), (11, 1987139), (77, 283877), (121, 180649), (131, 166859), (197, 110957), (847, 25807), (917, 23837), (1379, 15851), (1441, 15169), (2167, 10087)]