20691856

素因数分解:

$2^4\times {\mathrm{17}}^1\times {\mathrm{127}}^1\times {\mathrm{599}}^1$

素因数の和:751

約数の個数: 40

約数和(自身を含む): 42854400

約数和(自身を除く): 22162544

約数列:

[1, 2, 4, 8, 16, 17, 34, 68, 127, 136, 254, 272, 508, 599, 1016, 1198, 2032, 2159, 2396, 4318, 4792, 8636, 9584, 10183, 17272, 20366, 34544, 40732, 76073, 81464, 152146, 162928, 304292, 608584, 1217168, 1293241, 2586482, 5172964, 10345928, 20691856]

約数ペア:

[(1, 20691856), (2, 10345928), (4, 5172964), (8, 2586482), (16, 1293241), (17, 1217168), (34, 608584), (68, 304292), (127, 162928), (136, 152146), (254, 81464), (272, 76073), (508, 40732), (599, 34544), (1016, 20366), (1198, 17272), (2032, 10183), (2159, 9584), (2396, 8636), (4318, 4792)]