21357220

素因数分解:

$2^2\times 5^1\times {\mathrm{977}}^1\times {\mathrm{1093}}^1$

素因数の和:2079

約数の個数: 24

約数和(自身を含む): 44937144

約数和(自身を除く): 23579924

約数列:

[1, 2, 4, 5, 10, 20, 977, 1093, 1954, 2186, 3908, 4372, 4885, 5465, 9770, 10930, 19540, 21860, 1067861, 2135722, 4271444, 5339305, 10678610, 21357220]

約数ペア:

[(1, 21357220), (2, 10678610), (4, 5339305), (5, 4271444), (10, 2135722), (20, 1067861), (977, 21860), (1093, 19540), (1954, 10930), (2186, 9770), (3908, 5465), (4372, 4885)]