19774780

素因数分解:

$2^2\times 5^1\times {\mathrm{47}}^1\times {\mathrm{109}}^1\times {\mathrm{193}}^1$

素因数の和:358

約数の個数: 48

約数和(自身を含む): 43021440

約数和(自身を除く): 23246660

約数列:

[1, 2, 4, 5, 10, 20, 47, 94, 109, 188, 193, 218, 235, 386, 436, 470, 545, 772, 940, 965, 1090, 1930, 2180, 3860, 5123, 9071, 10246, 18142, 20492, 21037, 25615, 36284, 42074, 45355, 51230, 84148, 90710, 102460, 105185, 181420, 210370, 420740, 988739, 1977478, 3954956, 4943695, 9887390, 19774780]

約数ペア:

[(1, 19774780), (2, 9887390), (4, 4943695), (5, 3954956), (10, 1977478), (20, 988739), (47, 420740), (94, 210370), (109, 181420), (188, 105185), (193, 102460), (218, 90710), (235, 84148), (386, 51230), (436, 45355), (470, 42074), (545, 36284), (772, 25615), (940, 21037), (965, 20492), (1090, 18142), (1930, 10246), (2180, 9071), (3860, 5123)]