20991850

素因数分解:

$2^1\times 5^2\times {\mathrm{11}}^1\times {\mathrm{38167}}^1$

素因数の和:38190

約数の個数: 24

約数和(自身を含む): 42595488

約数和(自身を除く): 21603638

約数列:

[1, 2, 5, 10, 11, 22, 25, 50, 55, 110, 275, 550, 38167, 76334, 190835, 381670, 419837, 839674, 954175, 1908350, 2099185, 4198370, 10495925, 20991850]

約数ペア:

[(1, 20991850), (2, 10495925), (5, 4198370), (10, 2099185), (11, 1908350), (22, 954175), (25, 839674), (50, 419837), (55, 381670), (110, 190835), (275, 76334), (550, 38167)]