81217175

素因数分解:

$5^2\times {\mathrm{13}}^2\times {\mathrm{47}}^1\times {\mathrm{409}}^1$

素因数の和:492

約数の個数: 36

約数和(自身を含む): 111644640

約数和(自身を除く): 30427465

約数列:

[1, 5, 13, 25, 47, 65, 169, 235, 325, 409, 611, 845, 1175, 2045, 3055, 4225, 5317, 7943, 10225, 15275, 19223, 26585, 39715, 69121, 96115, 132925, 198575, 249899, 345605, 480575, 1249495, 1728025, 3248687, 6247475, 16243435, 81217175]

約数ペア:

[(1, 81217175), (5, 16243435), (13, 6247475), (25, 3248687), (47, 1728025), (65, 1249495), (169, 480575), (235, 345605), (325, 249899), (409, 198575), (611, 132925), (845, 96115), (1175, 69121), (2045, 39715), (3055, 26585), (4225, 19223), (5317, 15275), (7943, 10225)]