21038045

素因数分解:

$5^1\times 7^1\times {\mathrm{743}}^1\times {\mathrm{809}}^1$

素因数の和:1564

約数の個数: 16

約数和(自身を含む): 28926720

約数和(自身を除く): 7888675

約数列:

[1, 5, 7, 35, 743, 809, 3715, 4045, 5201, 5663, 26005, 28315, 601087, 3005435, 4207609, 21038045]

約数ペア:

[(1, 21038045), (5, 4207609), (7, 3005435), (35, 601087), (743, 28315), (809, 26005), (3715, 5663), (4045, 5201)]