128864440

素因数分解:

$2^3\times 5^1\times {\mathrm{199}}^1\times {\mathrm{16189}}^1$

素因数の和:16399

約数の個数: 32

約数和(自身を含む): 291420000

約数和(自身を除く): 162555560

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 199, 398, 796, 995, 1592, 1990, 3980, 7960, 16189, 32378, 64756, 80945, 129512, 161890, 323780, 647560, 3221611, 6443222, 12886444, 16108055, 25772888, 32216110, 64432220, 128864440]

約数ペア:

[(1, 128864440), (2, 64432220), (4, 32216110), (5, 25772888), (8, 16108055), (10, 12886444), (20, 6443222), (40, 3221611), (199, 647560), (398, 323780), (796, 161890), (995, 129512), (1592, 80945), (1990, 64756), (3980, 32378), (7960, 16189)]