20436560

素因数分解:

$2^4\times 5^1\times {\mathrm{255457}}^1$

素因数の和:255470

約数の個数: 20

約数和(自身を含む): 47515188

約数和(自身を除く): 27078628

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 255457, 510914, 1021828, 1277285, 2043656, 2554570, 4087312, 5109140, 10218280, 20436560]

約数ペア:

[(1, 20436560), (2, 10218280), (4, 5109140), (5, 4087312), (8, 2554570), (10, 2043656), (16, 1277285), (20, 1021828), (40, 510914), (80, 255457)]