81560240

素因数分解:

$2^4\times 5^1\times {\mathrm{1019503}}^1$

素因数の和:1019516

約数の個数: 20

約数和(自身を含む): 189627744

約数和(自身を除く): 108067504

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 1019503, 2039006, 4078012, 5097515, 8156024, 10195030, 16312048, 20390060, 40780120, 81560240]

約数ペア:

[(1, 81560240), (2, 40780120), (4, 20390060), (5, 16312048), (8, 10195030), (10, 8156024), (16, 5097515), (20, 4078012), (40, 2039006), (80, 1019503)]