18688784

素因数分解:

$2^4\times {\mathrm{31}}^1\times {\mathrm{41}}^1\times {\mathrm{919}}^1$

素因数の和:999

約数の個数: 40

約数和(自身を含む): 38330880

約数和(自身を除く): 19642096

約数列:

[1, 2, 4, 8, 16, 31, 41, 62, 82, 124, 164, 248, 328, 496, 656, 919, 1271, 1838, 2542, 3676, 5084, 7352, 10168, 14704, 20336, 28489, 37679, 56978, 75358, 113956, 150716, 227912, 301432, 455824, 602864, 1168049, 2336098, 4672196, 9344392, 18688784]

約数ペア:

[(1, 18688784), (2, 9344392), (4, 4672196), (8, 2336098), (16, 1168049), (31, 602864), (41, 455824), (62, 301432), (82, 227912), (124, 150716), (164, 113956), (248, 75358), (328, 56978), (496, 37679), (656, 28489), (919, 20336), (1271, 14704), (1838, 10168), (2542, 7352), (3676, 5084)]