20913800

素因数分解:

$2^3\times 5^2\times {\mathrm{53}}^1\times {\mathrm{1973}}^1$

素因数の和:2042

約数の個数: 48

約数和(自身を含む): 49567140

約数和(自身を除く): 28653340

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 53, 100, 106, 200, 212, 265, 424, 530, 1060, 1325, 1973, 2120, 2650, 3946, 5300, 7892, 9865, 10600, 15784, 19730, 39460, 49325, 78920, 98650, 104569, 197300, 209138, 394600, 418276, 522845, 836552, 1045690, 2091380, 2614225, 4182760, 5228450, 10456900, 20913800]

約数ペア:

[(1, 20913800), (2, 10456900), (4, 5228450), (5, 4182760), (8, 2614225), (10, 2091380), (20, 1045690), (25, 836552), (40, 522845), (50, 418276), (53, 394600), (100, 209138), (106, 197300), (200, 104569), (212, 98650), (265, 78920), (424, 49325), (530, 39460), (1060, 19730), (1325, 15784), (1973, 10600), (2120, 9865), (2650, 7892), (3946, 5300)]