20002045

素因数分解:

$5^1\times 7^3\times {\mathrm{107}}^1\times {\mathrm{109}}^1$

素因数の和:242

約数の個数: 32

約数和(自身を含む): 28512000

約数和(自身を除く): 8509955

約数列:

[1, 5, 7, 35, 49, 107, 109, 245, 343, 535, 545, 749, 763, 1715, 3745, 3815, 5243, 5341, 11663, 26215, 26705, 36701, 37387, 58315, 81641, 183505, 186935, 408205, 571487, 2857435, 4000409, 20002045]

約数ペア:

[(1, 20002045), (5, 4000409), (7, 2857435), (35, 571487), (49, 408205), (107, 186935), (109, 183505), (245, 81641), (343, 58315), (535, 37387), (545, 36701), (749, 26705), (763, 26215), (1715, 11663), (3745, 5341), (3815, 5243)]