21578454

素因数分解:

$2^1\times 3^3\times {\mathrm{399601}}^1$

素因数の和:399612

約数の個数: 16

約数和(自身を含む): 47952240

約数和(自身を除く): 26373786

約数列:

[1, 2, 3, 6, 9, 18, 27, 54, 399601, 799202, 1198803, 2397606, 3596409, 7192818, 10789227, 21578454]

約数ペア:

[(1, 21578454), (2, 10789227), (3, 7192818), (6, 3596409), (9, 2397606), (18, 1198803), (27, 799202), (54, 399601)]