19434980

素因数分解:

$2^2\times 5^1\times {\mathrm{139}}^1\times {\mathrm{6991}}^1$

素因数の和:7139

約数の個数: 24

約数和(自身を含む): 41112960

約数和(自身を除く): 21677980

約数列:

[1, 2, 4, 5, 10, 20, 139, 278, 556, 695, 1390, 2780, 6991, 13982, 27964, 34955, 69910, 139820, 971749, 1943498, 3886996, 4858745, 9717490, 19434980]

約数ペア:

[(1, 19434980), (2, 9717490), (4, 4858745), (5, 3886996), (10, 1943498), (20, 971749), (139, 139820), (278, 69910), (556, 34955), (695, 27964), (1390, 13982), (2780, 6991)]