64876721

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{139}}^1\times {\mathrm{223}}^1$

素因数の和:405

約数の個数: 32

約数和(自身を含む): 84295680

約数和(自身を除く): 19418959

約数列:

[1, 7, 13, 23, 91, 139, 161, 223, 299, 973, 1561, 1807, 2093, 2899, 3197, 5129, 12649, 20293, 22379, 30997, 35903, 41561, 66677, 216979, 290927, 402961, 466739, 712931, 2820727, 4990517, 9268103, 64876721]

約数ペア:

[(1, 64876721), (7, 9268103), (13, 4990517), (23, 2820727), (91, 712931), (139, 466739), (161, 402961), (223, 290927), (299, 216979), (973, 66677), (1561, 41561), (1807, 35903), (2093, 30997), (2899, 22379), (3197, 20293), (5129, 12649)]