21207789

素因数分解:

$3^2\times {\mathrm{17}}^1\times {\mathrm{97}}^1\times {\mathrm{1429}}^1$

素因数の和:1549

約数の個数: 24

約数和(自身を含む): 32792760

約数和(自身を除く): 11584971

約数列:

[1, 3, 9, 17, 51, 97, 153, 291, 873, 1429, 1649, 4287, 4947, 12861, 14841, 24293, 72879, 138613, 218637, 415839, 1247517, 2356421, 7069263, 21207789]

約数ペア:

[(1, 21207789), (3, 7069263), (9, 2356421), (17, 1247517), (51, 415839), (97, 218637), (153, 138613), (291, 72879), (873, 24293), (1429, 14841), (1649, 12861), (4287, 4947)]