820880240

素因数分解:

$2^4\times 5^1\times {\mathrm{10261003}}^1$

素因数の和:10261016

約数の個数: 20

約数和(自身を含む): 1908546744

約数和(自身を除く): 1087666504

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 10261003, 20522006, 41044012, 51305015, 82088024, 102610030, 164176048, 205220060, 410440120, 820880240]

約数ペア:

[(1, 820880240), (2, 410440120), (4, 205220060), (5, 164176048), (8, 102610030), (10, 82088024), (16, 51305015), (20, 41044012), (40, 20522006), (80, 10261003)]