81814475

素因数分解:

$5^2\times {\mathrm{19}}^1\times {\mathrm{41}}^1\times {\mathrm{4201}}^1$

素因数の和:4271

約数の個数: 24

約数和(自身を含む): 109420080

約数和(自身を除く): 27605605

約数列:

[1, 5, 19, 25, 41, 95, 205, 475, 779, 1025, 3895, 4201, 19475, 21005, 79819, 105025, 172241, 399095, 861205, 1995475, 3272579, 4306025, 16362895, 81814475]

約数ペア:

[(1, 81814475), (5, 16362895), (19, 4306025), (25, 3272579), (41, 1995475), (95, 861205), (205, 399095), (475, 172241), (779, 105025), (1025, 79819), (3895, 21005), (4201, 19475)]