19999940

素因数分解:

$2^2\times 5^1\times {\mathrm{757}}^1\times {\mathrm{1321}}^1$

素因数の和:2087

約数の個数: 24

約数和(自身を含む): 42087192

約数和(自身を除く): 22087252

約数列:

[1, 2, 4, 5, 10, 20, 757, 1321, 1514, 2642, 3028, 3785, 5284, 6605, 7570, 13210, 15140, 26420, 999997, 1999994, 3999988, 4999985, 9999970, 19999940]

約数ペア:

[(1, 19999940), (2, 9999970), (4, 4999985), (5, 3999988), (10, 1999994), (20, 999997), (757, 26420), (1321, 15140), (1514, 13210), (2642, 7570), (3028, 6605), (3785, 5284)]