21398019

素因数分解:

$3^1\times {\mathrm{17}}^1\times {\mathrm{47}}^1\times {\mathrm{79}}^1\times {\mathrm{113}}^1$

素因数の和:259

約数の個数: 32

約数和(自身を含む): 31518720

約数和(自身を除く): 10120701

約数列:

[1, 3, 17, 47, 51, 79, 113, 141, 237, 339, 799, 1343, 1921, 2397, 3713, 4029, 5311, 5763, 8927, 11139, 15933, 26781, 63121, 90287, 151759, 189363, 270861, 419569, 455277, 1258707, 7132673, 21398019]

約数ペア:

[(1, 21398019), (3, 7132673), (17, 1258707), (47, 455277), (51, 419569), (79, 270861), (113, 189363), (141, 151759), (237, 90287), (339, 63121), (799, 26781), (1343, 15933), (1921, 11139), (2397, 8927), (3713, 5763), (4029, 5311)]