20520906

素因数分解:

$2^1\times 3^1\times 7^2\times {\mathrm{223}}^1\times {\mathrm{313}}^1$

素因数の和:555

約数の個数: 48

約数和(自身を含む): 48109824

約数和(自身を除く): 27588918

約数列:

[1, 2, 3, 6, 7, 14, 21, 42, 49, 98, 147, 223, 294, 313, 446, 626, 669, 939, 1338, 1561, 1878, 2191, 3122, 4382, 4683, 6573, 9366, 10927, 13146, 15337, 21854, 30674, 32781, 46011, 65562, 69799, 92022, 139598, 209397, 418794, 488593, 977186, 1465779, 2931558, 3420151, 6840302, 10260453, 20520906]

約数ペア:

[(1, 20520906), (2, 10260453), (3, 6840302), (6, 3420151), (7, 2931558), (14, 1465779), (21, 977186), (42, 488593), (49, 418794), (98, 209397), (147, 139598), (223, 92022), (294, 69799), (313, 65562), (446, 46011), (626, 32781), (669, 30674), (939, 21854), (1338, 15337), (1561, 13146), (1878, 10927), (2191, 9366), (3122, 6573), (4382, 4683)]