20649800

素因数分解:

$2^3\times 5^2\times {\mathrm{223}}^1\times {\mathrm{463}}^1$

素因数の和:702

約数の個数: 48

約数和(自身を含む): 48330240

約数和(自身を除く): 27680440

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 100, 200, 223, 446, 463, 892, 926, 1115, 1784, 1852, 2230, 2315, 3704, 4460, 4630, 5575, 8920, 9260, 11150, 11575, 18520, 22300, 23150, 44600, 46300, 92600, 103249, 206498, 412996, 516245, 825992, 1032490, 2064980, 2581225, 4129960, 5162450, 10324900, 20649800]

約数ペア:

[(1, 20649800), (2, 10324900), (4, 5162450), (5, 4129960), (8, 2581225), (10, 2064980), (20, 1032490), (25, 825992), (40, 516245), (50, 412996), (100, 206498), (200, 103249), (223, 92600), (446, 46300), (463, 44600), (892, 23150), (926, 22300), (1115, 18520), (1784, 11575), (1852, 11150), (2230, 9260), (2315, 8920), (3704, 5575), (4460, 4630)]