21328615

素因数分解:

$5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{55399}}^1$

素因数の和:55422

約数の個数: 16

約数和(自身を含む): 31910400

約数和(自身を除く): 10581785

約数列:

[1, 5, 7, 11, 35, 55, 77, 385, 55399, 276995, 387793, 609389, 1938965, 3046945, 4265723, 21328615]

約数ペア:

[(1, 21328615), (5, 4265723), (7, 3046945), (11, 1938965), (35, 609389), (55, 387793), (77, 276995), (385, 55399)]