20655700

素因数分解:

$2^2\times 5^2\times {\mathrm{13}}^1\times {\mathrm{15889}}^1$

素因数の和:15916

約数の個数: 36

約数和(自身を含む): 48273820

約数和(自身を除く): 27618120

約数列:

[1, 2, 4, 5, 10, 13, 20, 25, 26, 50, 52, 65, 100, 130, 260, 325, 650, 1300, 15889, 31778, 63556, 79445, 158890, 206557, 317780, 397225, 413114, 794450, 826228, 1032785, 1588900, 2065570, 4131140, 5163925, 10327850, 20655700]

約数ペア:

[(1, 20655700), (2, 10327850), (4, 5163925), (5, 4131140), (10, 2065570), (13, 1588900), (20, 1032785), (25, 826228), (26, 794450), (50, 413114), (52, 397225), (65, 317780), (100, 206557), (130, 158890), (260, 79445), (325, 63556), (650, 31778), (1300, 15889)]