20687787

素因数分解:

$3^2\times {\mathrm{23}}^1\times {\mathrm{139}}^1\times {\mathrm{719}}^1$

素因数の和:887

約数の個数: 24

約数和(自身を含む): 31449600

約数和(自身を除く): 10761813

約数列:

[1, 3, 9, 23, 69, 139, 207, 417, 719, 1251, 2157, 3197, 6471, 9591, 16537, 28773, 49611, 99941, 148833, 299823, 899469, 2298643, 6895929, 20687787]

約数ペア:

[(1, 20687787), (3, 6895929), (9, 2298643), (23, 899469), (69, 299823), (139, 148833), (207, 99941), (417, 49611), (719, 28773), (1251, 16537), (2157, 9591), (3197, 6471)]