280521

素因数分解:

$3^2\times {\mathrm{71}}^1\times {\mathrm{439}}^1$

素因数の和:516

約数の個数: 12

約数和(自身を含む): 411840

約数和(自身を除く): 131319

約数列:

[1, 3, 9, 71, 213, 439, 639, 1317, 3951, 31169, 93507, 280521]

約数ペア:

[(1, 280521), (3, 93507), (9, 31169), (71, 3951), (213, 1317), (439, 639)]