28205919

素因数分解:

$3^2\times 7^3\times {\mathrm{9137}}^1$

素因数の和:9164

約数の個数: 24

約数和(自身を含む): 47517600

約数和(自身を除く): 19311681

約数列:

[1, 3, 7, 9, 21, 49, 63, 147, 343, 441, 1029, 3087, 9137, 27411, 63959, 82233, 191877, 447713, 575631, 1343139, 3133991, 4029417, 9401973, 28205919]

約数ペア:

[(1, 28205919), (3, 9401973), (7, 4029417), (9, 3133991), (21, 1343139), (49, 575631), (63, 447713), (147, 191877), (343, 82233), (441, 63959), (1029, 27411), (3087, 9137)]