20972091

素因数分解:

$3^1\times 7^1\times {\mathrm{307}}^1\times {\mathrm{3253}}^1$

素因数の和:3570

約数の個数: 16

約数和(自身を含む): 32071424

約数和(自身を除く): 11099333

約数列:

[1, 3, 7, 21, 307, 921, 2149, 3253, 6447, 9759, 22771, 68313, 998671, 2996013, 6990697, 20972091]

約数ペア:

[(1, 20972091), (3, 6990697), (7, 2996013), (21, 998671), (307, 68313), (921, 22771), (2149, 9759), (3253, 6447)]