20197475

素因数分解:

$5^2\times {\mathrm{19}}^1\times {\mathrm{101}}^1\times {\mathrm{421}}^1$

素因数の和:551

約数の個数: 24

約数和(自身を含む): 26687280

約数和(自身を除く): 6489805

約数列:

[1, 5, 19, 25, 95, 101, 421, 475, 505, 1919, 2105, 2525, 7999, 9595, 10525, 39995, 42521, 47975, 199975, 212605, 807899, 1063025, 4039495, 20197475]

約数ペア:

[(1, 20197475), (5, 4039495), (19, 1063025), (25, 807899), (95, 212605), (101, 199975), (421, 47975), (475, 42521), (505, 39995), (1919, 10525), (2105, 9595), (2525, 7999)]