20510900

素因数分解:

$2^2\times 5^2\times {\mathrm{443}}^1\times {\mathrm{463}}^1$

素因数の和:920

約数の個数: 36

約数和(自身を含む): 44705472

約数和(自身を除く): 24194572

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 443, 463, 886, 926, 1772, 1852, 2215, 2315, 4430, 4630, 8860, 9260, 11075, 11575, 22150, 23150, 44300, 46300, 205109, 410218, 820436, 1025545, 2051090, 4102180, 5127725, 10255450, 20510900]

約数ペア:

[(1, 20510900), (2, 10255450), (4, 5127725), (5, 4102180), (10, 2051090), (20, 1025545), (25, 820436), (50, 410218), (100, 205109), (443, 46300), (463, 44300), (886, 23150), (926, 22150), (1772, 11575), (1852, 11075), (2215, 9260), (2315, 8860), (4430, 4630)]