51687800

素因数分解:

$2^3\times 5^2\times {\mathrm{109}}^1\times {\mathrm{2371}}^1$

素因数の和:2496

約数の個数: 48

約数和(自身を含む): 121327800

約数和(自身を除く): 69640000

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 100, 109, 200, 218, 436, 545, 872, 1090, 2180, 2371, 2725, 4360, 4742, 5450, 9484, 10900, 11855, 18968, 21800, 23710, 47420, 59275, 94840, 118550, 237100, 258439, 474200, 516878, 1033756, 1292195, 2067512, 2584390, 5168780, 6460975, 10337560, 12921950, 25843900, 51687800]

約数ペア:

[(1, 51687800), (2, 25843900), (4, 12921950), (5, 10337560), (8, 6460975), (10, 5168780), (20, 2584390), (25, 2067512), (40, 1292195), (50, 1033756), (100, 516878), (109, 474200), (200, 258439), (218, 237100), (436, 118550), (545, 94840), (872, 59275), (1090, 47420), (2180, 23710), (2371, 21800), (2725, 18968), (4360, 11855), (4742, 10900), (5450, 9484)]