20557100

素因数分解:

$2^2\times 5^2\times {\mathrm{311}}^1\times {\mathrm{661}}^1$

素因数の和:986

約数の個数: 36

約数和(自身を含む): 44820048

約数和(自身を除く): 24262948

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 311, 622, 661, 1244, 1322, 1555, 2644, 3110, 3305, 6220, 6610, 7775, 13220, 15550, 16525, 31100, 33050, 66100, 205571, 411142, 822284, 1027855, 2055710, 4111420, 5139275, 10278550, 20557100]

約数ペア:

[(1, 20557100), (2, 10278550), (4, 5139275), (5, 4111420), (10, 2055710), (20, 1027855), (25, 822284), (50, 411142), (100, 205571), (311, 66100), (622, 33050), (661, 31100), (1244, 16525), (1322, 15550), (1555, 13220), (2644, 7775), (3110, 6610), (3305, 6220)]