21263275

素因数分解:

$5^2\times {\mathrm{11}}^1\times {\mathrm{167}}^1\times {\mathrm{463}}^1$

素因数の和:651

約数の個数: 24

約数和(自身を含む): 28998144

約数和(自身を除く): 7734869

約数列:

[1, 5, 11, 25, 55, 167, 275, 463, 835, 1837, 2315, 4175, 5093, 9185, 11575, 25465, 45925, 77321, 127325, 386605, 850531, 1933025, 4252655, 21263275]

約数ペア:

[(1, 21263275), (5, 4252655), (11, 1933025), (25, 850531), (55, 386605), (167, 127325), (275, 77321), (463, 45925), (835, 25465), (1837, 11575), (2315, 9185), (4175, 5093)]