28720180

素因数分解:

$2^2\times 5^1\times {\mathrm{139}}^1\times {\mathrm{10331}}^1$

素因数の和:10479

約数の個数: 24

約数和(自身を含む): 60752160

約数和(自身を除く): 32031980

約数列:

[1, 2, 4, 5, 10, 20, 139, 278, 556, 695, 1390, 2780, 10331, 20662, 41324, 51655, 103310, 206620, 1436009, 2872018, 5744036, 7180045, 14360090, 28720180]

約数ペア:

[(1, 28720180), (2, 14360090), (4, 7180045), (5, 5744036), (10, 2872018), (20, 1436009), (139, 206620), (278, 103310), (556, 51655), (695, 41324), (1390, 20662), (2780, 10331)]