21200977

素因数分解:

$7^2\times {\mathrm{41}}^1\times {\mathrm{61}}^1\times {\mathrm{173}}^1$

素因数の和:289

約数の個数: 24

約数和(自身を含む): 25826472

約数和(自身を除く): 4625495

約数列:

[1, 7, 41, 49, 61, 173, 287, 427, 1211, 2009, 2501, 2989, 7093, 8477, 10553, 17507, 49651, 73871, 122549, 347557, 432673, 517097, 3028711, 21200977]

約数ペア:

[(1, 21200977), (7, 3028711), (41, 517097), (49, 432673), (61, 347557), (173, 122549), (287, 73871), (427, 49651), (1211, 17507), (2009, 10553), (2501, 8477), (2989, 7093)]