21389615

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{109}}^1\times {\mathrm{3019}}^1$

素因数の和:3146

約数の個数: 16

約数和(自身を含む): 27904800

約数和(自身を除く): 6515185

約数列:

[1, 5, 13, 65, 109, 545, 1417, 3019, 7085, 15095, 39247, 196235, 329071, 1645355, 4277923, 21389615]

約数ペア:

[(1, 21389615), (5, 4277923), (13, 1645355), (65, 329071), (109, 196235), (545, 39247), (1417, 15095), (3019, 7085)]