21521178

素因数分解:

$2^1\times 3^2\times 7^1\times {\mathrm{109}}^1\times {\mathrm{1567}}^1$

素因数の和:1691

約数の個数: 48

約数和(自身を含む): 53813760

約数和(自身を除く): 32292582

約数列:

[1, 2, 3, 6, 7, 9, 14, 18, 21, 42, 63, 109, 126, 218, 327, 654, 763, 981, 1526, 1567, 1962, 2289, 3134, 4578, 4701, 6867, 9402, 10969, 13734, 14103, 21938, 28206, 32907, 65814, 98721, 170803, 197442, 341606, 512409, 1024818, 1195621, 1537227, 2391242, 3074454, 3586863, 7173726, 10760589, 21521178]

約数ペア:

[(1, 21521178), (2, 10760589), (3, 7173726), (6, 3586863), (7, 3074454), (9, 2391242), (14, 1537227), (18, 1195621), (21, 1024818), (42, 512409), (63, 341606), (109, 197442), (126, 170803), (218, 98721), (327, 65814), (654, 32907), (763, 28206), (981, 21938), (1526, 14103), (1567, 13734), (1962, 10969), (2289, 9402), (3134, 6867), (4578, 4701)]