21129579

素因数分解:

$3^5\times {\mathrm{89}}^1\times {\mathrm{977}}^1$

素因数の和:1081

約数の個数: 24

約数和(自身を含む): 32039280

約数和(自身を除く): 10909701

約数列:

[1, 3, 9, 27, 81, 89, 243, 267, 801, 977, 2403, 2931, 7209, 8793, 21627, 26379, 79137, 86953, 237411, 260859, 782577, 2347731, 7043193, 21129579]

約数ペア:

[(1, 21129579), (3, 7043193), (9, 2347731), (27, 782577), (81, 260859), (89, 237411), (243, 86953), (267, 79137), (801, 26379), (977, 21627), (2403, 8793), (2931, 7209)]