21648740

素因数分解:

$2^2\times 5^1\times {\mathrm{137}}^1\times {\mathrm{7901}}^1$

素因数の和:8047

約数の個数: 24

約数和(自身を含む): 45799992

約数和(自身を除く): 24151252

約数列:

[1, 2, 4, 5, 10, 20, 137, 274, 548, 685, 1370, 2740, 7901, 15802, 31604, 39505, 79010, 158020, 1082437, 2164874, 4329748, 5412185, 10824370, 21648740]

約数ペア:

[(1, 21648740), (2, 10824370), (4, 5412185), (5, 4329748), (10, 2164874), (20, 1082437), (137, 158020), (274, 79010), (548, 39505), (685, 31604), (1370, 15802), (2740, 7901)]