21496820

素因数分解:

$2^2\times 5^1\times {\mathrm{569}}^1\times {\mathrm{1889}}^1$

素因数の和:2467

約数の個数: 24

約数和(自身を含む): 45246600

約数和(自身を除く): 23749780

約数列:

[1, 2, 4, 5, 10, 20, 569, 1138, 1889, 2276, 2845, 3778, 5690, 7556, 9445, 11380, 18890, 37780, 1074841, 2149682, 4299364, 5374205, 10748410, 21496820]

約数ペア:

[(1, 21496820), (2, 10748410), (4, 5374205), (5, 4299364), (10, 2149682), (20, 1074841), (569, 37780), (1138, 18890), (1889, 11380), (2276, 9445), (2845, 7556), (3778, 5690)]