21951315

素因数分解:

$3^2\times 5^1\times {\mathrm{23}}^1\times {\mathrm{127}}^1\times {\mathrm{167}}^1$

素因数の和:328

約数の個数: 48

約数和(自身を含む): 40255488

約数和(自身を除く): 18304173

約数列:

[1, 3, 5, 9, 15, 23, 45, 69, 115, 127, 167, 207, 345, 381, 501, 635, 835, 1035, 1143, 1503, 1905, 2505, 2921, 3841, 5715, 7515, 8763, 11523, 14605, 19205, 21209, 26289, 34569, 43815, 57615, 63627, 106045, 131445, 172845, 190881, 318135, 487807, 954405, 1463421, 2439035, 4390263, 7317105, 21951315]

約数ペア:

[(1, 21951315), (3, 7317105), (5, 4390263), (9, 2439035), (15, 1463421), (23, 954405), (45, 487807), (69, 318135), (115, 190881), (127, 172845), (167, 131445), (207, 106045), (345, 63627), (381, 57615), (501, 43815), (635, 34569), (835, 26289), (1035, 21209), (1143, 19205), (1503, 14605), (1905, 11523), (2505, 8763), (2921, 7515), (3841, 5715)]