9991120

素因数分解:

$2^4\times 5^1\times {\mathrm{71}}^1\times {\mathrm{1759}}^1$

素因数の和:1843

約数の個数: 40

約数和(自身を含む): 23569920

約数和(自身を除く): 13578800

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 71, 80, 142, 284, 355, 568, 710, 1136, 1420, 1759, 2840, 3518, 5680, 7036, 8795, 14072, 17590, 28144, 35180, 70360, 124889, 140720, 249778, 499556, 624445, 999112, 1248890, 1998224, 2497780, 4995560, 9991120]

約数ペア:

[(1, 9991120), (2, 4995560), (4, 2497780), (5, 1998224), (8, 1248890), (10, 999112), (16, 624445), (20, 499556), (40, 249778), (71, 140720), (80, 124889), (142, 70360), (284, 35180), (355, 28144), (568, 17590), (710, 14072), (1136, 8795), (1420, 7036), (1759, 5680), (2840, 3518)]