18897040

素因数分解:

$2^4\times 5^1\times {\mathrm{199}}^1\times {\mathrm{1187}}^1$

素因数の和:1399

約数の個数: 40

約数和(自身を含む): 44193600

約数和(自身を除く): 25296560

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 199, 398, 796, 995, 1187, 1592, 1990, 2374, 3184, 3980, 4748, 5935, 7960, 9496, 11870, 15920, 18992, 23740, 47480, 94960, 236213, 472426, 944852, 1181065, 1889704, 2362130, 3779408, 4724260, 9448520, 18897040]

約数ペア:

[(1, 18897040), (2, 9448520), (4, 4724260), (5, 3779408), (8, 2362130), (10, 1889704), (16, 1181065), (20, 944852), (40, 472426), (80, 236213), (199, 94960), (398, 47480), (796, 23740), (995, 18992), (1187, 15920), (1592, 11870), (1990, 9496), (2374, 7960), (3184, 5935), (3980, 4748)]