18484840

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{977}}^1$

素因数の和:1042

約数の個数: 64

約数和(自身を含む): 46474560

約数和(自身を除く): 27989720

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 43, 44, 55, 86, 88, 110, 172, 215, 220, 344, 430, 440, 473, 860, 946, 977, 1720, 1892, 1954, 2365, 3784, 3908, 4730, 4885, 7816, 9460, 9770, 10747, 18920, 19540, 21494, 39080, 42011, 42988, 53735, 84022, 85976, 107470, 168044, 210055, 214940, 336088, 420110, 429880, 462121, 840220, 924242, 1680440, 1848484, 2310605, 3696968, 4621210, 9242420, 18484840]

約数ペア:

[(1, 18484840), (2, 9242420), (4, 4621210), (5, 3696968), (8, 2310605), (10, 1848484), (11, 1680440), (20, 924242), (22, 840220), (40, 462121), (43, 429880), (44, 420110), (55, 336088), (86, 214940), (88, 210055), (110, 168044), (172, 107470), (215, 85976), (220, 84022), (344, 53735), (430, 42988), (440, 42011), (473, 39080), (860, 21494), (946, 19540), (977, 18920), (1720, 10747), (1892, 9770), (1954, 9460), (2365, 7816), (3784, 4885), (3908, 4730)]