21612140

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{193}}^1\times {\mathrm{509}}^1$

素因数の和:722

約数の個数: 48

約数和(自身を含む): 49865760

約数和(自身を除く): 28253620

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 193, 220, 386, 509, 772, 965, 1018, 1930, 2036, 2123, 2545, 3860, 4246, 5090, 5599, 8492, 10180, 10615, 11198, 21230, 22396, 27995, 42460, 55990, 98237, 111980, 196474, 392948, 491185, 982370, 1080607, 1964740, 2161214, 4322428, 5403035, 10806070, 21612140]

約数ペア:

[(1, 21612140), (2, 10806070), (4, 5403035), (5, 4322428), (10, 2161214), (11, 1964740), (20, 1080607), (22, 982370), (44, 491185), (55, 392948), (110, 196474), (193, 111980), (220, 98237), (386, 55990), (509, 42460), (772, 27995), (965, 22396), (1018, 21230), (1930, 11198), (2036, 10615), (2123, 10180), (2545, 8492), (3860, 5599), (4246, 5090)]