21157355

素因数分解:

$5^1\times {\mathrm{19}}^1\times {\mathrm{23}}^2\times {\mathrm{421}}^1$

素因数の和:491

約数の個数: 24

約数和(自身を含む): 28003920

約数和(自身を除く): 6846565

約数列:

[1, 5, 19, 23, 95, 115, 421, 437, 529, 2105, 2185, 2645, 7999, 9683, 10051, 39995, 48415, 50255, 183977, 222709, 919885, 1113545, 4231471, 21157355]

約数ペア:

[(1, 21157355), (5, 4231471), (19, 1113545), (23, 919885), (95, 222709), (115, 183977), (421, 50255), (437, 48415), (529, 39995), (2105, 10051), (2185, 9683), (2645, 7999)]