18909268

素因数分解:

$2^2\times 7^1\times {\mathrm{61}}^1\times {\mathrm{11071}}^1$

素因数の和:11143

約数の個数: 24

約数和(自身を含む): 38441984

約数和(自身を除く): 19532716

約数列:

[1, 2, 4, 7, 14, 28, 61, 122, 244, 427, 854, 1708, 11071, 22142, 44284, 77497, 154994, 309988, 675331, 1350662, 2701324, 4727317, 9454634, 18909268]

約数ペア:

[(1, 18909268), (2, 9454634), (4, 4727317), (7, 2701324), (14, 1350662), (28, 675331), (61, 309988), (122, 154994), (244, 77497), (427, 44284), (854, 22142), (1708, 11071)]