19899560

素因数分解:

$2^3\times 5^1\times {\mathrm{443}}^1\times {\mathrm{1123}}^1$

素因数の和:1577

約数の個数: 32

約数和(自身を含む): 44915040

約数和(自身を除く): 25015480

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 443, 886, 1123, 1772, 2215, 2246, 3544, 4430, 4492, 5615, 8860, 8984, 11230, 17720, 22460, 44920, 497489, 994978, 1989956, 2487445, 3979912, 4974890, 9949780, 19899560]

約数ペア:

[(1, 19899560), (2, 9949780), (4, 4974890), (5, 3979912), (8, 2487445), (10, 1989956), (20, 994978), (40, 497489), (443, 44920), (886, 22460), (1123, 17720), (1772, 11230), (2215, 8984), (2246, 8860), (3544, 5615), (4430, 4492)]