28947723

素因数分解:

$3^1\times 7^1\times {\mathrm{47}}^1\times {\mathrm{139}}^1\times {\mathrm{211}}^1$

素因数の和:407

約数の個数: 32

約数和(自身を含む): 45588480

約数和(自身を除く): 16640757

約数列:

[1, 3, 7, 21, 47, 139, 141, 211, 329, 417, 633, 973, 987, 1477, 2919, 4431, 6533, 9917, 19599, 29329, 29751, 45731, 69419, 87987, 137193, 205303, 208257, 615909, 1378463, 4135389, 9649241, 28947723]

約数ペア:

[(1, 28947723), (3, 9649241), (7, 4135389), (21, 1378463), (47, 615909), (139, 208257), (141, 205303), (211, 137193), (329, 87987), (417, 69419), (633, 45731), (973, 29751), (987, 29329), (1477, 19599), (2919, 9917), (4431, 6533)]