20644880

素因数分解:

$2^4\times 5^1\times {\mathrm{258061}}^1$

素因数の和:258074

約数の個数: 20

約数和(自身を含む): 47999532

約数和(自身を除く): 27354652

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 258061, 516122, 1032244, 1290305, 2064488, 2580610, 4128976, 5161220, 10322440, 20644880]

約数ペア:

[(1, 20644880), (2, 10322440), (4, 5161220), (5, 4128976), (8, 2580610), (10, 2064488), (16, 1290305), (20, 1032244), (40, 516122), (80, 258061)]