18921845

素因数分解:

$5^1\times {\mathrm{89}}^1\times {\mathrm{101}}^1\times {\mathrm{421}}^1$

素因数の和:616

約数の個数: 16

約数和(自身を含む): 23243760

約数和(自身を除く): 4321915

約数列:

[1, 5, 89, 101, 421, 445, 505, 2105, 8989, 37469, 42521, 44945, 187345, 212605, 3784369, 18921845]

約数ペア:

[(1, 18921845), (5, 3784369), (89, 212605), (101, 187345), (421, 44945), (445, 42521), (505, 37469), (2105, 8989)]