28720778

素因数分解:

$2^1\times {\mathrm{71}}^1\times {\mathrm{257}}^1\times {\mathrm{787}}^1$

素因数の和:1117

約数の個数: 16

約数和(自身を含む): 43913664

約数和(自身を除く): 15192886

約数列:

[1, 2, 71, 142, 257, 514, 787, 1574, 18247, 36494, 55877, 111754, 202259, 404518, 14360389, 28720778]

約数ペア:

[(1, 28720778), (2, 14360389), (71, 404518), (142, 202259), (257, 111754), (514, 55877), (787, 36494), (1574, 18247)]