21437540

素因数分解:

$2^2\times 5^1\times {\mathrm{197}}^1\times {\mathrm{5441}}^1$

素因数の和:5647

約数の個数: 24

約数和(自身を含む): 45255672

約数和(自身を除く): 23818132

約数列:

[1, 2, 4, 5, 10, 20, 197, 394, 788, 985, 1970, 3940, 5441, 10882, 21764, 27205, 54410, 108820, 1071877, 2143754, 4287508, 5359385, 10718770, 21437540]

約数ペア:

[(1, 21437540), (2, 10718770), (4, 5359385), (5, 4287508), (10, 2143754), (20, 1071877), (197, 108820), (394, 54410), (788, 27205), (985, 21764), (1970, 10882), (3940, 5441)]