21897909

素因数分解:

$3^2\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{59}}^1\times {\mathrm{163}}^1$

素因数の和:262

約数の個数: 48

約数和(自身を含む): 36840960

約数和(自身を除く): 14943051

約数列:

[1, 3, 9, 11, 23, 33, 59, 69, 99, 163, 177, 207, 253, 489, 531, 649, 759, 1357, 1467, 1793, 1947, 2277, 3749, 4071, 5379, 5841, 9617, 11247, 12213, 14927, 16137, 28851, 33741, 41239, 44781, 86553, 105787, 123717, 134343, 221191, 317361, 371151, 663573, 952083, 1990719, 2433101, 7299303, 21897909]

約数ペア:

[(1, 21897909), (3, 7299303), (9, 2433101), (11, 1990719), (23, 952083), (33, 663573), (59, 371151), (69, 317361), (99, 221191), (163, 134343), (177, 123717), (207, 105787), (253, 86553), (489, 44781), (531, 41239), (649, 33741), (759, 28851), (1357, 16137), (1467, 14927), (1793, 12213), (1947, 11247), (2277, 9617), (3749, 5841), (4071, 5379)]