20215120

素因数分解:

$2^4\times 5^1\times {\mathrm{71}}^1\times {\mathrm{3559}}^1$

素因数の和:3643

約数の個数: 40

約数和(自身を含む): 47675520

約数和(自身を除く): 27460400

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 71, 80, 142, 284, 355, 568, 710, 1136, 1420, 2840, 3559, 5680, 7118, 14236, 17795, 28472, 35590, 56944, 71180, 142360, 252689, 284720, 505378, 1010756, 1263445, 2021512, 2526890, 4043024, 5053780, 10107560, 20215120]

約数ペア:

[(1, 20215120), (2, 10107560), (4, 5053780), (5, 4043024), (8, 2526890), (10, 2021512), (16, 1263445), (20, 1010756), (40, 505378), (71, 284720), (80, 252689), (142, 142360), (284, 71180), (355, 56944), (568, 35590), (710, 28472), (1136, 17795), (1420, 14236), (2840, 7118), (3559, 5680)]