647161947

素因数分解:

$3^3\times {\mathrm{71}}^1\times {\mathrm{439}}^1\times {\mathrm{769}}^1$

素因数の和:1288

約数の個数: 32

約数和(自身を含む): 975744000

約数和(自身を除く): 328582053

約数列:

[1, 3, 9, 27, 71, 213, 439, 639, 769, 1317, 1917, 2307, 3951, 6921, 11853, 20763, 31169, 54599, 93507, 163797, 280521, 337591, 491391, 841563, 1012773, 1474173, 3038319, 9114957, 23968961, 71906883, 215720649, 647161947]

約数ペア:

[(1, 647161947), (3, 215720649), (9, 71906883), (27, 23968961), (71, 9114957), (213, 3038319), (439, 1474173), (639, 1012773), (769, 841563), (1317, 491391), (1917, 337591), (2307, 280521), (3951, 163797), (6921, 93507), (11853, 54599), (20763, 31169)]