20510620

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{78887}}^1$

素因数の和:78909

約数の個数: 24

約数和(自身を含む): 46386144

約数和(自身を除く): 25875524

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 78887, 157774, 315548, 394435, 788870, 1025531, 1577740, 2051062, 4102124, 5127655, 10255310, 20510620]

約数ペア:

[(1, 20510620), (2, 10255310), (4, 5127655), (5, 4102124), (10, 2051062), (13, 1577740), (20, 1025531), (26, 788870), (52, 394435), (65, 315548), (130, 157774), (260, 78887)]