21223419

素因数分解:

$3^1\times 7^2\times {\mathrm{353}}^1\times {\mathrm{409}}^1$

素因数の和:779

約数の個数: 24

約数和(自身を含む): 33091920

約数和(自身を除く): 11868501

約数列:

[1, 3, 7, 21, 49, 147, 353, 409, 1059, 1227, 2471, 2863, 7413, 8589, 17297, 20041, 51891, 60123, 144377, 433131, 1010639, 3031917, 7074473, 21223419]

約数ペア:

[(1, 21223419), (3, 7074473), (7, 3031917), (21, 1010639), (49, 433131), (147, 144377), (353, 60123), (409, 51891), (1059, 20041), (1227, 17297), (2471, 8589), (2863, 7413)]