20391135

素因数分解:

$3^1\times 5^1\times {\mathrm{421}}^1\times {\mathrm{3229}}^1$

素因数の和:3658

約数の個数: 16

約数和(自身を含む): 32713440

約数和(自身を除く): 12322305

約数列:

[1, 3, 5, 15, 421, 1263, 2105, 3229, 6315, 9687, 16145, 48435, 1359409, 4078227, 6797045, 20391135]

約数ペア:

[(1, 20391135), (3, 6797045), (5, 4078227), (15, 1359409), (421, 48435), (1263, 16145), (2105, 9687), (3229, 6315)]