19846220

素因数分解:

$2^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{47}}^1\times {\mathrm{491}}^1$

素因数の和:590

約数の個数: 48

約数和(自身を含む): 43642368

約数和(自身を除く): 23796148

約数列:

[1, 2, 4, 5, 10, 20, 43, 47, 86, 94, 172, 188, 215, 235, 430, 470, 491, 860, 940, 982, 1964, 2021, 2455, 4042, 4910, 8084, 9820, 10105, 20210, 21113, 23077, 40420, 42226, 46154, 84452, 92308, 105565, 115385, 211130, 230770, 422260, 461540, 992311, 1984622, 3969244, 4961555, 9923110, 19846220]

約数ペア:

[(1, 19846220), (2, 9923110), (4, 4961555), (5, 3969244), (10, 1984622), (20, 992311), (43, 461540), (47, 422260), (86, 230770), (94, 211130), (172, 115385), (188, 105565), (215, 92308), (235, 84452), (430, 46154), (470, 42226), (491, 40420), (860, 23077), (940, 21113), (982, 20210), (1964, 10105), (2021, 9820), (2455, 8084), (4042, 4910)]