20628560

素因数分解:

$2^4\times 5^1\times {\mathrm{257857}}^1$

素因数の和:257870

約数の個数: 20

約数和(自身を含む): 47961588

約数和(自身を除く): 27333028

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 257857, 515714, 1031428, 1289285, 2062856, 2578570, 4125712, 5157140, 10314280, 20628560]

約数ペア:

[(1, 20628560), (2, 10314280), (4, 5157140), (5, 4125712), (8, 2578570), (10, 2062856), (16, 1289285), (20, 1031428), (40, 515714), (80, 257857)]