18931438

素因数分解:

$2^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{43}}^1\times {\mathrm{563}}^1$

素因数の和:648

約数の個数: 32

約数和(自身を含む): 32161536

約数和(自身を除く): 13230098

約数列:

[1, 2, 17, 23, 34, 43, 46, 86, 391, 563, 731, 782, 989, 1126, 1462, 1978, 9571, 12949, 16813, 19142, 24209, 25898, 33626, 48418, 220133, 411553, 440266, 556807, 823106, 1113614, 9465719, 18931438]

約数ペア:

[(1, 18931438), (2, 9465719), (17, 1113614), (23, 823106), (34, 556807), (43, 440266), (46, 411553), (86, 220133), (391, 48418), (563, 33626), (731, 25898), (782, 24209), (989, 19142), (1126, 16813), (1462, 12949), (1978, 9571)]