20685175

素因数分解:

$5^2\times 7^1\times {\mathrm{17}}^2\times {\mathrm{409}}^1$

素因数の和:460

約数の個数: 36

約数和(自身を含む): 31215760

約数和(自身を除く): 10530585

約数列:

[1, 5, 7, 17, 25, 35, 85, 119, 175, 289, 409, 425, 595, 1445, 2023, 2045, 2863, 2975, 6953, 7225, 10115, 10225, 14315, 34765, 48671, 50575, 71575, 118201, 173825, 243355, 591005, 827407, 1216775, 2955025, 4137035, 20685175]

約数ペア:

[(1, 20685175), (5, 4137035), (7, 2955025), (17, 1216775), (25, 827407), (35, 591005), (85, 243355), (119, 173825), (175, 118201), (289, 71575), (409, 50575), (425, 48671), (595, 34765), (1445, 14315), (2023, 10225), (2045, 10115), (2863, 7225), (2975, 6953)]