638260940

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{47}}^1\times {\mathrm{16561}}^1$

素因数の和:16658

約数の個数: 48

約数和(自身を含む): 1402337664

約数和(自身を除く): 764076724

約数列:

[1, 2, 4, 5, 10, 20, 41, 47, 82, 94, 164, 188, 205, 235, 410, 470, 820, 940, 1927, 3854, 7708, 9635, 16561, 19270, 33122, 38540, 66244, 82805, 165610, 331220, 679001, 778367, 1358002, 1556734, 2716004, 3113468, 3395005, 3891835, 6790010, 7783670, 13580020, 15567340, 31913047, 63826094, 127652188, 159565235, 319130470, 638260940]

約数ペア:

[(1, 638260940), (2, 319130470), (4, 159565235), (5, 127652188), (10, 63826094), (20, 31913047), (41, 15567340), (47, 13580020), (82, 7783670), (94, 6790010), (164, 3891835), (188, 3395005), (205, 3113468), (235, 2716004), (410, 1556734), (470, 1358002), (820, 778367), (940, 679001), (1927, 331220), (3854, 165610), (7708, 82805), (9635, 66244), (16561, 38540), (19270, 33122)]