21428883

素因数分解:

$3^2\times 7^1\times {\mathrm{29}}^1\times {\mathrm{37}}^1\times {\mathrm{317}}^1$

素因数の和:396

約数の個数: 48

約数和(自身を含む): 37702080

約数和(自身を除く): 16273197

約数列:

[1, 3, 7, 9, 21, 29, 37, 63, 87, 111, 203, 259, 261, 317, 333, 609, 777, 951, 1073, 1827, 2219, 2331, 2853, 3219, 6657, 7511, 9193, 9657, 11729, 19971, 22533, 27579, 35187, 64351, 67599, 82103, 82737, 105561, 193053, 246309, 340141, 579159, 738927, 1020423, 2380987, 3061269, 7142961, 21428883]

約数ペア:

[(1, 21428883), (3, 7142961), (7, 3061269), (9, 2380987), (21, 1020423), (29, 738927), (37, 579159), (63, 340141), (87, 246309), (111, 193053), (203, 105561), (259, 82737), (261, 82103), (317, 67599), (333, 64351), (609, 35187), (777, 27579), (951, 22533), (1073, 19971), (1827, 11729), (2219, 9657), (2331, 9193), (2853, 7511), (3219, 6657)]