18966790

素因数分解:

$2^1\times 5^1\times {\mathrm{89}}^1\times {\mathrm{101}}^1\times {\mathrm{211}}^1$

素因数の和:408

約数の個数: 32

約数和(自身を含む): 35030880

約数和(自身を除く): 16064090

約数列:

[1, 2, 5, 10, 89, 101, 178, 202, 211, 422, 445, 505, 890, 1010, 1055, 2110, 8989, 17978, 18779, 21311, 37558, 42622, 44945, 89890, 93895, 106555, 187790, 213110, 1896679, 3793358, 9483395, 18966790]

約数ペア:

[(1, 18966790), (2, 9483395), (5, 3793358), (10, 1896679), (89, 213110), (101, 187790), (178, 106555), (202, 93895), (211, 89890), (422, 44945), (445, 42622), (505, 37558), (890, 21311), (1010, 18779), (1055, 17978), (2110, 8989)]