19720731

素因数分解:

$3^1\times {\mathrm{17}}^1\times {\mathrm{73}}^1\times {\mathrm{5297}}^1$

素因数の和:5390

約数の個数: 16

約数和(自身を含む): 28227744

約数和(自身を除く): 8507013

約数列:

[1, 3, 17, 51, 73, 219, 1241, 3723, 5297, 15891, 90049, 270147, 386681, 1160043, 6573577, 19720731]

約数ペア:

[(1, 19720731), (3, 6573577), (17, 1160043), (51, 386681), (73, 270147), (219, 90049), (1241, 15891), (3723, 5297)]