18628780

素因数分解:

$2^2\times 5^1\times {\mathrm{139}}^1\times {\mathrm{6701}}^1$

素因数の和:6849

約数の個数: 24

約数和(自身を含む): 39407760

約数和(自身を除く): 20778980

約数列:

[1, 2, 4, 5, 10, 20, 139, 278, 556, 695, 1390, 2780, 6701, 13402, 26804, 33505, 67010, 134020, 931439, 1862878, 3725756, 4657195, 9314390, 18628780]

約数ペア:

[(1, 18628780), (2, 9314390), (4, 4657195), (5, 3725756), (10, 1862878), (20, 931439), (139, 134020), (278, 67010), (556, 33505), (695, 26804), (1390, 13402), (2780, 6701)]