21898315

素因数分解:

$5^1\times {\mathrm{101}}^1\times {\mathrm{103}}^1\times {\mathrm{421}}^1$

素因数の和:630

約数の個数: 16

約数和(自身を含む): 26859456

約数和(自身を除く): 4961141

約数列:

[1, 5, 101, 103, 421, 505, 515, 2105, 10403, 42521, 43363, 52015, 212605, 216815, 4379663, 21898315]

約数ペア:

[(1, 21898315), (5, 4379663), (101, 216815), (103, 212605), (421, 52015), (505, 43363), (515, 42521), (2105, 10403)]