20019505

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{181}}^1\times {\mathrm{2011}}^1$

素因数の和:2208

約数の個数: 16

約数和(自身を含む): 26365248

約数和(自身を除く): 6345743

約数列:

[1, 5, 11, 55, 181, 905, 1991, 2011, 9955, 10055, 22121, 110605, 363991, 1819955, 4003901, 20019505]

約数ペア:

[(1, 20019505), (5, 4003901), (11, 1819955), (55, 363991), (181, 110605), (905, 22121), (1991, 10055), (2011, 9955)]