16720809

素因数分解:

$3^1\times 7^2\times {\mathrm{17}}^1\times {\mathrm{6691}}^1$

素因数の和:6725

約数の個数: 24

約数和(自身を含む): 27463968

約数和(自身を除く): 10743159

約数列:

[1, 3, 7, 17, 21, 49, 51, 119, 147, 357, 833, 2499, 6691, 20073, 46837, 113747, 140511, 327859, 341241, 796229, 983577, 2388687, 5573603, 16720809]

約数ペア:

[(1, 16720809), (3, 5573603), (7, 2388687), (17, 983577), (21, 796229), (49, 341241), (51, 327859), (119, 140511), (147, 113747), (357, 46837), (833, 20073), (2499, 6691)]