20645816

素因数分解:

$2^3\times {\mathrm{61}}^1\times {\mathrm{42307}}^1$

素因数の和:42374

約数の個数: 16

約数和(自身を含む): 39346440

約数和(自身を除く): 18700624

約数列:

[1, 2, 4, 8, 61, 122, 244, 488, 42307, 84614, 169228, 338456, 2580727, 5161454, 10322908, 20645816]

約数ペア:

[(1, 20645816), (2, 10322908), (4, 5161454), (8, 2580727), (61, 338456), (122, 169228), (244, 84614), (488, 42307)]