19790270

素因数分解:

$2^1\times 5^1\times {\mathrm{991}}^1\times {\mathrm{1997}}^1$

素因数の和:2995

約数の個数: 16

約数和(自身を含む): 35676288

約数和(自身を除く): 15886018

約数列:

[1, 2, 5, 10, 991, 1982, 1997, 3994, 4955, 9910, 9985, 19970, 1979027, 3958054, 9895135, 19790270]

約数ペア:

[(1, 19790270), (2, 9895135), (5, 3958054), (10, 1979027), (991, 19970), (1982, 9985), (1997, 9910), (3994, 4955)]