12880820

素因数分解:

$2^2\times 5^1\times {\mathrm{47}}^1\times {\mathrm{71}}^1\times {\mathrm{193}}^1$

素因数の和:320

約数の個数: 48

約数和(自身を含む): 28159488

約数和(自身を除く): 15278668

約数列:

[1, 2, 4, 5, 10, 20, 47, 71, 94, 142, 188, 193, 235, 284, 355, 386, 470, 710, 772, 940, 965, 1420, 1930, 3337, 3860, 6674, 9071, 13348, 13703, 16685, 18142, 27406, 33370, 36284, 45355, 54812, 66740, 68515, 90710, 137030, 181420, 274060, 644041, 1288082, 2576164, 3220205, 6440410, 12880820]

約数ペア:

[(1, 12880820), (2, 6440410), (4, 3220205), (5, 2576164), (10, 1288082), (20, 644041), (47, 274060), (71, 181420), (94, 137030), (142, 90710), (188, 68515), (193, 66740), (235, 54812), (284, 45355), (355, 36284), (386, 33370), (470, 27406), (710, 18142), (772, 16685), (940, 13703), (965, 13348), (1420, 9071), (1930, 6674), (3337, 3860)]