128007579

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{320821}}^1$

素因数の和:320850

約数の個数: 16

約数和(自身を含む): 205326080

約数和(自身を除く): 77318501

約数列:

[1, 3, 7, 19, 21, 57, 133, 399, 320821, 962463, 2245747, 6095599, 6737241, 18286797, 42669193, 128007579]

約数ペア:

[(1, 128007579), (3, 42669193), (7, 18286797), (19, 6737241), (21, 6095599), (57, 2245747), (133, 962463), (399, 320821)]