20952981

素因数分解:

$3^2\times 7^1\times {\mathrm{103}}^1\times {\mathrm{3229}}^1$

素因数の和:3345

約数の個数: 24

約数和(自身を含む): 34935680

約数和(自身を除く): 13982699

約数列:

[1, 3, 7, 9, 21, 63, 103, 309, 721, 927, 2163, 3229, 6489, 9687, 22603, 29061, 67809, 203427, 332587, 997761, 2328109, 2993283, 6984327, 20952981]

約数ペア:

[(1, 20952981), (3, 6984327), (7, 2993283), (9, 2328109), (21, 997761), (63, 332587), (103, 203427), (309, 67809), (721, 29061), (927, 22603), (2163, 9687), (3229, 6489)]