20892140

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^2\times {\mathrm{1087}}^1$

素因数の和:1158

約数の個数: 36

約数和(自身を含む): 45376128

約数和(自身を除く): 24483988

約数列:

[1, 2, 4, 5, 10, 20, 31, 62, 124, 155, 310, 620, 961, 1087, 1922, 2174, 3844, 4348, 4805, 5435, 9610, 10870, 19220, 21740, 33697, 67394, 134788, 168485, 336970, 673940, 1044607, 2089214, 4178428, 5223035, 10446070, 20892140]

約数ペア:

[(1, 20892140), (2, 10446070), (4, 5223035), (5, 4178428), (10, 2089214), (20, 1044607), (31, 673940), (62, 336970), (124, 168485), (155, 134788), (310, 67394), (620, 33697), (961, 21740), (1087, 19220), (1922, 10870), (2174, 9610), (3844, 5435), (4348, 4805)]