20401857

素因数分解:

$3^2\times 7^1\times {\mathrm{109}}^1\times {\mathrm{2971}}^1$

素因数の和:3093

約数の個数: 24

約数和(自身を含む): 33999680

約数和(自身を除く): 13597823

約数列:

[1, 3, 7, 9, 21, 63, 109, 327, 763, 981, 2289, 2971, 6867, 8913, 20797, 26739, 62391, 187173, 323839, 971517, 2266873, 2914551, 6800619, 20401857]

約数ペア:

[(1, 20401857), (3, 6800619), (7, 2914551), (9, 2266873), (21, 971517), (63, 323839), (109, 187173), (327, 62391), (763, 26739), (981, 20797), (2289, 8913), (2971, 6867)]