21239631

素因数分解:

$3^3\times 7^1\times {\mathrm{109}}^1\times {\mathrm{1031}}^1$

素因数の和:1156

約数の個数: 32

約数和(自身を含む): 36326400

約数和(自身を除く): 15086769

約数列:

[1, 3, 7, 9, 21, 27, 63, 109, 189, 327, 763, 981, 1031, 2289, 2943, 3093, 6867, 7217, 9279, 20601, 21651, 27837, 64953, 112379, 194859, 337137, 786653, 1011411, 2359959, 3034233, 7079877, 21239631]

約数ペア:

[(1, 21239631), (3, 7079877), (7, 3034233), (9, 2359959), (21, 1011411), (27, 786653), (63, 337137), (109, 194859), (189, 112379), (327, 64953), (763, 27837), (981, 21651), (1031, 20601), (2289, 9279), (2943, 7217), (3093, 6867)]