257913175

素因数分解:

$5^2\times {\mathrm{13}}^1\times {\mathrm{401}}^1\times {\mathrm{1979}}^1$

素因数の和:2403

約数の個数: 24

約数和(自身を含む): 345446640

約数和(自身を除く): 87533465

約数列:

[1, 5, 13, 25, 65, 325, 401, 1979, 2005, 5213, 9895, 10025, 25727, 26065, 49475, 128635, 130325, 643175, 793579, 3967895, 10316527, 19839475, 51582635, 257913175]

約数ペア:

[(1, 257913175), (5, 51582635), (13, 19839475), (25, 10316527), (65, 3967895), (325, 793579), (401, 643175), (1979, 130325), (2005, 128635), (5213, 49475), (9895, 26065), (10025, 25727)]