638025985

素因数分解:

$5^1\times {\mathrm{19}}^2\times {\mathrm{139}}^1\times {\mathrm{2543}}^1$

素因数の和:2725

約数の個数: 24

約数和(自身を含む): 814181760

約数和(自身を除く): 176155775

約数列:

[1, 5, 19, 95, 139, 361, 695, 1805, 2543, 2641, 12715, 13205, 48317, 50179, 241585, 250895, 353477, 918023, 1767385, 4590115, 6716063, 33580315, 127605197, 638025985]

約数ペア:

[(1, 638025985), (5, 127605197), (19, 33580315), (95, 6716063), (139, 4590115), (361, 1767385), (695, 918023), (1805, 353477), (2543, 250895), (2641, 241585), (12715, 50179), (13205, 48317)]