21298365

素因数分解:

$3^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{2531}}^1$

素因数の和:2570

約数の個数: 48

約数和(自身を含む): 42659136

約数和(自身を除く): 21360771

約数列:

[1, 3, 5, 9, 11, 15, 17, 33, 45, 51, 55, 85, 99, 153, 165, 187, 255, 495, 561, 765, 935, 1683, 2531, 2805, 7593, 8415, 12655, 22779, 27841, 37965, 43027, 83523, 113895, 129081, 139205, 215135, 250569, 387243, 417615, 473297, 645405, 1252845, 1419891, 1936215, 2366485, 4259673, 7099455, 21298365]

約数ペア:

[(1, 21298365), (3, 7099455), (5, 4259673), (9, 2366485), (11, 1936215), (15, 1419891), (17, 1252845), (33, 645405), (45, 473297), (51, 417615), (55, 387243), (85, 250569), (99, 215135), (153, 139205), (165, 129081), (187, 113895), (255, 83523), (495, 43027), (561, 37965), (765, 27841), (935, 22779), (1683, 12655), (2531, 8415), (2805, 7593)]