21837680

素因数分解:

$2^4\times 5^1\times {\mathrm{272971}}^1$

素因数の和:272984

約数の個数: 20

約数和(自身を含む): 50772792

約数和(自身を除く): 28935112

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 272971, 545942, 1091884, 1364855, 2183768, 2729710, 4367536, 5459420, 10918840, 21837680]

約数ペア:

[(1, 21837680), (2, 10918840), (4, 5459420), (5, 4367536), (8, 2729710), (10, 2183768), (16, 1364855), (20, 1091884), (40, 545942), (80, 272971)]