20573780

素因数分解:

$2^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{47}}^1\times {\mathrm{509}}^1$

素因数の和:608

約数の個数: 48

約数和(自身を含む): 45239040

約数和(自身を除く): 24665260

約数列:

[1, 2, 4, 5, 10, 20, 43, 47, 86, 94, 172, 188, 215, 235, 430, 470, 509, 860, 940, 1018, 2021, 2036, 2545, 4042, 5090, 8084, 10105, 10180, 20210, 21887, 23923, 40420, 43774, 47846, 87548, 95692, 109435, 119615, 218870, 239230, 437740, 478460, 1028689, 2057378, 4114756, 5143445, 10286890, 20573780]

約数ペア:

[(1, 20573780), (2, 10286890), (4, 5143445), (5, 4114756), (10, 2057378), (20, 1028689), (43, 478460), (47, 437740), (86, 239230), (94, 218870), (172, 119615), (188, 109435), (215, 95692), (235, 87548), (430, 47846), (470, 43774), (509, 40420), (860, 23923), (940, 21887), (1018, 20210), (2021, 10180), (2036, 10105), (2545, 8084), (4042, 5090)]