21512775

素因数分解:

$3^1\times 5^2\times {\mathrm{373}}^1\times {\mathrm{769}}^1$

素因数の和:1155

約数の個数: 24

約数和(自身を含む): 35709520

約数和(自身を除く): 14196745

約数列:

[1, 3, 5, 15, 25, 75, 373, 769, 1119, 1865, 2307, 3845, 5595, 9325, 11535, 19225, 27975, 57675, 286837, 860511, 1434185, 4302555, 7170925, 21512775]

約数ペア:

[(1, 21512775), (3, 7170925), (5, 4302555), (15, 1434185), (25, 860511), (75, 286837), (373, 57675), (769, 27975), (1119, 19225), (1865, 11535), (2307, 9325), (3845, 5595)]