21116207

素因数分解:

$7^2\times {\mathrm{47}}^1\times {\mathrm{53}}^1\times {\mathrm{173}}^1$

素因数の和:287

約数の個数: 24

約数和(自身を含む): 25707456

約数和(自身を除く): 4591249

約数列:

[1, 7, 47, 49, 53, 173, 329, 371, 1211, 2303, 2491, 2597, 8131, 8477, 9169, 17437, 56917, 64183, 122059, 398419, 430943, 449281, 3016601, 21116207]

約数ペア:

[(1, 21116207), (7, 3016601), (47, 449281), (49, 430943), (53, 398419), (173, 122059), (329, 64183), (371, 56917), (1211, 17437), (2303, 9169), (2491, 8477), (2597, 8131)]