18992560

素因数分解:

$2^4\times 5^1\times {\mathrm{199}}^1\times {\mathrm{1193}}^1$

素因数の和:1405

約数の個数: 40

約数和(自身を含む): 44416800

約数和(自身を除く): 25424240

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 199, 398, 796, 995, 1193, 1592, 1990, 2386, 3184, 3980, 4772, 5965, 7960, 9544, 11930, 15920, 19088, 23860, 47720, 95440, 237407, 474814, 949628, 1187035, 1899256, 2374070, 3798512, 4748140, 9496280, 18992560]

約数ペア:

[(1, 18992560), (2, 9496280), (4, 4748140), (5, 3798512), (8, 2374070), (10, 1899256), (16, 1187035), (20, 949628), (40, 474814), (80, 237407), (199, 95440), (398, 47720), (796, 23860), (995, 19088), (1193, 15920), (1592, 11930), (1990, 9544), (2386, 7960), (3184, 5965), (3980, 4772)]