20801920

素因数分解:

$2^7\times 5^1\times {\mathrm{32503}}^1$

素因数の和:32522

約数の個数: 32

約数和(自身を含む): 49731120

約数和(自身を除く): 28929200

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 320, 640, 32503, 65006, 130012, 162515, 260024, 325030, 520048, 650060, 1040096, 1300120, 2080192, 2600240, 4160384, 5200480, 10400960, 20801920]

約数ペア:

[(1, 20801920), (2, 10400960), (4, 5200480), (5, 4160384), (8, 2600240), (10, 2080192), (16, 1300120), (20, 1040096), (32, 650060), (40, 520048), (64, 325030), (80, 260024), (128, 162515), (160, 130012), (320, 65006), (640, 32503)]