21523975

素因数分解:

$5^2\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{41}}^1\times {\mathrm{83}}^1$

素因数の和:168

約数の個数: 48

約数和(自身を含む): 31497984

約数和(自身を除く): 9974009

約数列:

[1, 5, 11, 23, 25, 41, 55, 83, 115, 205, 253, 275, 415, 451, 575, 913, 943, 1025, 1265, 1909, 2075, 2255, 3403, 4565, 4715, 6325, 9545, 10373, 11275, 17015, 20999, 22825, 23575, 37433, 47725, 51865, 78269, 85075, 104995, 187165, 259325, 391345, 524975, 860959, 935825, 1956725, 4304795, 21523975]

約数ペア:

[(1, 21523975), (5, 4304795), (11, 1956725), (23, 935825), (25, 860959), (41, 524975), (55, 391345), (83, 259325), (115, 187165), (205, 104995), (253, 85075), (275, 78269), (415, 51865), (451, 47725), (575, 37433), (913, 23575), (943, 22825), (1025, 20999), (1265, 17015), (1909, 11275), (2075, 10373), (2255, 9545), (3403, 6325), (4565, 4715)]