21420620

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{82387}}^1$

素因数の和:82409

約数の個数: 24

約数和(自身を含む): 48444144

約数和(自身を除く): 27023524

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 82387, 164774, 329548, 411935, 823870, 1071031, 1647740, 2142062, 4284124, 5355155, 10710310, 21420620]

約数ペア:

[(1, 21420620), (2, 10710310), (4, 5355155), (5, 4284124), (10, 2142062), (13, 1647740), (20, 1071031), (26, 823870), (52, 411935), (65, 329548), (130, 164774), (260, 82387)]