21127689

素因数分解:

$3^3\times {\mathrm{11}}^2\times {\mathrm{29}}^1\times {\mathrm{223}}^1$

素因数の和:283

約数の個数: 48

約数和(自身を含む): 35750400

約数和(自身を除く): 14622711

約数列:

[1, 3, 9, 11, 27, 29, 33, 87, 99, 121, 223, 261, 297, 319, 363, 669, 783, 957, 1089, 2007, 2453, 2871, 3267, 3509, 6021, 6467, 7359, 8613, 10527, 19401, 22077, 26983, 31581, 58203, 66231, 71137, 80949, 94743, 174609, 213411, 242847, 640233, 728541, 782507, 1920699, 2347521, 7042563, 21127689]

約数ペア:

[(1, 21127689), (3, 7042563), (9, 2347521), (11, 1920699), (27, 782507), (29, 728541), (33, 640233), (87, 242847), (99, 213411), (121, 174609), (223, 94743), (261, 80949), (297, 71137), (319, 66231), (363, 58203), (669, 31581), (783, 26983), (957, 22077), (1089, 19401), (2007, 10527), (2453, 8613), (2871, 7359), (3267, 6467), (3509, 6021)]