21707037

素因数分解:

$3^2\times {\mathrm{11}}^2\times {\mathrm{31}}^1\times {\mathrm{643}}^1$

素因数の和:702

約数の個数: 36

約数和(自身を含む): 35631232

約数和(自身を除く): 13924195

約数列:

[1, 3, 9, 11, 31, 33, 93, 99, 121, 279, 341, 363, 643, 1023, 1089, 1929, 3069, 3751, 5787, 7073, 11253, 19933, 21219, 33759, 59799, 63657, 77803, 179397, 219263, 233409, 657789, 700227, 1973367, 2411893, 7235679, 21707037]

約数ペア:

[(1, 21707037), (3, 7235679), (9, 2411893), (11, 1973367), (31, 700227), (33, 657789), (93, 233409), (99, 219263), (121, 179397), (279, 77803), (341, 63657), (363, 59799), (643, 33759), (1023, 21219), (1089, 19933), (1929, 11253), (3069, 7073), (3751, 5787)]