21286923

素因数分解:

$3^1\times 7^3\times {\mathrm{137}}^1\times {\mathrm{151}}^1$

素因数の和:312

約数の個数: 32

約数和(自身を含む): 33561600

約数和(自身を除く): 12274677

約数列:

[1, 3, 7, 21, 49, 137, 147, 151, 343, 411, 453, 959, 1029, 1057, 2877, 3171, 6713, 7399, 20139, 20687, 22197, 46991, 51793, 62061, 140973, 144809, 155379, 434427, 1013663, 3040989, 7095641, 21286923]

約数ペア:

[(1, 21286923), (3, 7095641), (7, 3040989), (21, 1013663), (49, 434427), (137, 155379), (147, 144809), (151, 140973), (343, 62061), (411, 51793), (453, 46991), (959, 22197), (1029, 20687), (1057, 20139), (2877, 7399), (3171, 6713)]