20993255

素因数分解:

$5^1\times {\mathrm{47}}^1\times {\mathrm{157}}^1\times {\mathrm{569}}^1$

素因数の和:778

約数の個数: 16

約数和(自身を含む): 25937280

約数和(自身を除く): 4944025

約数列:

[1, 5, 47, 157, 235, 569, 785, 2845, 7379, 26743, 36895, 89333, 133715, 446665, 4198651, 20993255]

約数ペア:

[(1, 20993255), (5, 4198651), (47, 446665), (157, 133715), (235, 89333), (569, 36895), (785, 26743), (2845, 7379)]