20997244

素因数分解:

$2^2\times {\mathrm{17}}^1\times {\mathrm{43}}^2\times {\mathrm{167}}^1$

素因数の和:274

約数の個数: 36

約数和(自身を含む): 40071024

約数和(自身を除く): 19073780

約数列:

[1, 2, 4, 17, 34, 43, 68, 86, 167, 172, 334, 668, 731, 1462, 1849, 2839, 2924, 3698, 5678, 7181, 7396, 11356, 14362, 28724, 31433, 62866, 122077, 125732, 244154, 308783, 488308, 617566, 1235132, 5249311, 10498622, 20997244]

約数ペア:

[(1, 20997244), (2, 10498622), (4, 5249311), (17, 1235132), (34, 617566), (43, 488308), (68, 308783), (86, 244154), (167, 125732), (172, 122077), (334, 62866), (668, 31433), (731, 28724), (1462, 14362), (1849, 11356), (2839, 7396), (2924, 7181), (3698, 5678)]