20563600

素因数分解:

$2^4\times 5^2\times {\mathrm{101}}^1\times {\mathrm{509}}^1$

素因数の和:628

約数の個数: 60

約数和(自身を含む): 49991220

約数和(自身を除く): 29427620

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 101, 200, 202, 400, 404, 505, 509, 808, 1010, 1018, 1616, 2020, 2036, 2525, 2545, 4040, 4072, 5050, 5090, 8080, 8144, 10100, 10180, 12725, 20200, 20360, 25450, 40400, 40720, 50900, 51409, 101800, 102818, 203600, 205636, 257045, 411272, 514090, 822544, 1028180, 1285225, 2056360, 2570450, 4112720, 5140900, 10281800, 20563600]

約数ペア:

[(1, 20563600), (2, 10281800), (4, 5140900), (5, 4112720), (8, 2570450), (10, 2056360), (16, 1285225), (20, 1028180), (25, 822544), (40, 514090), (50, 411272), (80, 257045), (100, 205636), (101, 203600), (200, 102818), (202, 101800), (400, 51409), (404, 50900), (505, 40720), (509, 40400), (808, 25450), (1010, 20360), (1018, 20200), (1616, 12725), (2020, 10180), (2036, 10100), (2525, 8144), (2545, 8080), (4040, 5090), (4072, 5050)]