20780253

素因数分解:

$3^3\times {\mathrm{13}}^1\times {\mathrm{73}}^1\times {\mathrm{811}}^1$

素因数の和:906

約数の個数: 32

約数和(自身を含む): 33649280

約数和(自身を除く): 12869027

約数列:

[1, 3, 9, 13, 27, 39, 73, 117, 219, 351, 657, 811, 949, 1971, 2433, 2847, 7299, 8541, 10543, 21897, 25623, 31629, 59203, 94887, 177609, 284661, 532827, 769639, 1598481, 2308917, 6926751, 20780253]

約数ペア:

[(1, 20780253), (3, 6926751), (9, 2308917), (13, 1598481), (27, 769639), (39, 532827), (73, 284661), (117, 177609), (219, 94887), (351, 59203), (657, 31629), (811, 25623), (949, 21897), (1971, 10543), (2433, 8541), (2847, 7299)]