20887780

素因数分解:

$2^2\times 5^1\times {\mathrm{83}}^1\times {\mathrm{12583}}^1$

素因数の和:12675

約数の個数: 24

約数和(自身を含む): 44396352

約数和(自身を除く): 23508572

約数列:

[1, 2, 4, 5, 10, 20, 83, 166, 332, 415, 830, 1660, 12583, 25166, 50332, 62915, 125830, 251660, 1044389, 2088778, 4177556, 5221945, 10443890, 20887780]

約数ペア:

[(1, 20887780), (2, 10443890), (4, 5221945), (5, 4177556), (10, 2088778), (20, 1044389), (83, 251660), (166, 125830), (332, 62915), (415, 50332), (830, 25166), (1660, 12583)]