19943975

素因数分解:

$5^2\times {\mathrm{17}}^1\times {\mathrm{167}}^1\times {\mathrm{281}}^1$

素因数の和:475

約数の個数: 24

約数和(自身を含む): 26435808

約数和(自身を除く): 6491833

約数列:

[1, 5, 17, 25, 85, 167, 281, 425, 835, 1405, 2839, 4175, 4777, 7025, 14195, 23885, 46927, 70975, 119425, 234635, 797759, 1173175, 3988795, 19943975]

約数ペア:

[(1, 19943975), (5, 3988795), (17, 1173175), (25, 797759), (85, 234635), (167, 119425), (281, 70975), (425, 46927), (835, 23885), (1405, 14195), (2839, 7025), (4175, 4777)]