21499998

素因数分解:

$2^1\times 3^1\times {\mathrm{13}}^1\times {\mathrm{275641}}^1$

素因数の和:275659

約数の個数: 16

約数和(自身を含む): 46307856

約数和(自身を除く): 24807858

約数列:

[1, 2, 3, 6, 13, 26, 39, 78, 275641, 551282, 826923, 1653846, 3583333, 7166666, 10749999, 21499998]

約数ペア:

[(1, 21499998), (2, 10749999), (3, 7166666), (6, 3583333), (13, 1653846), (26, 826923), (39, 551282), (78, 275641)]