21291399

素因数分解:

$3^2\times {\mathrm{23}}^1\times {\mathrm{73}}^1\times {\mathrm{1409}}^1$

素因数の和:1511

約数の個数: 24

約数和(自身を含む): 32554080

約数和(自身を除く): 11262681

約数列:

[1, 3, 9, 23, 69, 73, 207, 219, 657, 1409, 1679, 4227, 5037, 12681, 15111, 32407, 97221, 102857, 291663, 308571, 925713, 2365711, 7097133, 21291399]

約数ペア:

[(1, 21291399), (3, 7097133), (9, 2365711), (23, 925713), (69, 308571), (73, 291663), (207, 102857), (219, 97221), (657, 32407), (1409, 15111), (1679, 12681), (4227, 5037)]