20644600

素因数分解:

$2^3\times 5^2\times {\mathrm{109}}^1\times {\mathrm{947}}^1$

素因数の和:1072

約数の個数: 48

約数和(自身を含む): 48490200

約数和(自身を除く): 27845600

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 100, 109, 200, 218, 436, 545, 872, 947, 1090, 1894, 2180, 2725, 3788, 4360, 4735, 5450, 7576, 9470, 10900, 18940, 21800, 23675, 37880, 47350, 94700, 103223, 189400, 206446, 412892, 516115, 825784, 1032230, 2064460, 2580575, 4128920, 5161150, 10322300, 20644600]

約数ペア:

[(1, 20644600), (2, 10322300), (4, 5161150), (5, 4128920), (8, 2580575), (10, 2064460), (20, 1032230), (25, 825784), (40, 516115), (50, 412892), (100, 206446), (109, 189400), (200, 103223), (218, 94700), (436, 47350), (545, 37880), (872, 23675), (947, 21800), (1090, 18940), (1894, 10900), (2180, 9470), (2725, 7576), (3788, 5450), (4360, 4735)]