128848520

素因数分解:

$2^3\times 5^1\times {\mathrm{199}}^1\times {\mathrm{16187}}^1$

素因数の和:16397

約数の個数: 32

約数和(自身を含む): 291384000

約数和(自身を除く): 162535480

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 199, 398, 796, 995, 1592, 1990, 3980, 7960, 16187, 32374, 64748, 80935, 129496, 161870, 323740, 647480, 3221213, 6442426, 12884852, 16106065, 25769704, 32212130, 64424260, 128848520]

約数ペア:

[(1, 128848520), (2, 64424260), (4, 32212130), (5, 25769704), (8, 16106065), (10, 12884852), (20, 6442426), (40, 3221213), (199, 647480), (398, 323740), (796, 161870), (995, 129496), (1592, 80935), (1990, 64748), (3980, 32374), (7960, 16187)]