199418980

素因数分解:

$2^2\times 5^1\times {\mathrm{2131}}^1\times {\mathrm{4679}}^1$

素因数の和:6819

約数の個数: 24

約数和(自身を含む): 419065920

約数和(自身を除く): 219646940

約数列:

[1, 2, 4, 5, 10, 20, 2131, 4262, 4679, 8524, 9358, 10655, 18716, 21310, 23395, 42620, 46790, 93580, 9970949, 19941898, 39883796, 49854745, 99709490, 199418980]

約数ペア:

[(1, 199418980), (2, 99709490), (4, 49854745), (5, 39883796), (10, 19941898), (20, 9970949), (2131, 93580), (4262, 46790), (4679, 42620), (8524, 23395), (9358, 21310), (10655, 18716)]