12911120

素因数分解:

$2^4\times 5^1\times {\mathrm{199}}^1\times {\mathrm{811}}^1$

素因数の和:1023

約数の個数: 40

約数和(自身を含む): 30206400

約数和(自身を除く): 17295280

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 199, 398, 796, 811, 995, 1592, 1622, 1990, 3184, 3244, 3980, 4055, 6488, 7960, 8110, 12976, 15920, 16220, 32440, 64880, 161389, 322778, 645556, 806945, 1291112, 1613890, 2582224, 3227780, 6455560, 12911120]

約数ペア:

[(1, 12911120), (2, 6455560), (4, 3227780), (5, 2582224), (8, 1613890), (10, 1291112), (16, 806945), (20, 645556), (40, 322778), (80, 161389), (199, 64880), (398, 32440), (796, 16220), (811, 15920), (995, 12976), (1592, 8110), (1622, 7960), (1990, 6488), (3184, 4055), (3244, 3980)]