19707620

素因数分解:

$2^2\times 5^1\times {\mathrm{647}}^1\times {\mathrm{1523}}^1$

素因数の和:2179

約数の個数: 24

約数和(自身を含む): 41477184

約数和(自身を除く): 21769564

約数列:

[1, 2, 4, 5, 10, 20, 647, 1294, 1523, 2588, 3046, 3235, 6092, 6470, 7615, 12940, 15230, 30460, 985381, 1970762, 3941524, 4926905, 9853810, 19707620]

約数ペア:

[(1, 19707620), (2, 9853810), (4, 4926905), (5, 3941524), (10, 1970762), (20, 985381), (647, 30460), (1294, 15230), (1523, 12940), (2588, 7615), (3046, 6470), (3235, 6092)]