20219905

素因数分解:

$5^1\times {\mathrm{31}}^1\times {\mathrm{73}}^1\times {\mathrm{1787}}^1$

素因数の和:1896

約数の個数: 16

約数和(自身を含む): 25403904

約数和(自身を除く): 5183999

約数列:

[1, 5, 31, 73, 155, 365, 1787, 2263, 8935, 11315, 55397, 130451, 276985, 652255, 4043981, 20219905]

約数ペア:

[(1, 20219905), (5, 4043981), (31, 652255), (73, 276985), (155, 130451), (365, 55397), (1787, 11315), (2263, 8935)]