20701990

素因数分解:

$2^1\times 5^1\times {\mathrm{991}}^1\times {\mathrm{2089}}^1$

素因数の和:3087

約数の個数: 16

約数和(自身を含む): 37319040

約数和(自身を除く): 16617050

約数列:

[1, 2, 5, 10, 991, 1982, 2089, 4178, 4955, 9910, 10445, 20890, 2070199, 4140398, 10350995, 20701990]

約数ペア:

[(1, 20701990), (2, 10350995), (5, 4140398), (10, 2070199), (991, 20890), (1982, 10445), (2089, 9910), (4178, 4955)]