20587120

素因数分解:

$2^4\times 5^1\times {\mathrm{257339}}^1$

素因数の和:257352

約数の個数: 20

約数和(自身を含む): 47865240

約数和(自身を除く): 27278120

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 257339, 514678, 1029356, 1286695, 2058712, 2573390, 4117424, 5146780, 10293560, 20587120]

約数ペア:

[(1, 20587120), (2, 10293560), (4, 5146780), (5, 4117424), (8, 2573390), (10, 2058712), (16, 1286695), (20, 1029356), (40, 514678), (80, 257339)]