20487249

素因数分解:

$3^4\times {\mathrm{31}}^1\times {\mathrm{41}}^1\times {\mathrm{199}}^1$

素因数の和:283

約数の個数: 40

約数和(自身を含む): 32524800

約数和(自身を除く): 12037551

約数列:

[1, 3, 9, 27, 31, 41, 81, 93, 123, 199, 279, 369, 597, 837, 1107, 1271, 1791, 2511, 3321, 3813, 5373, 6169, 8159, 11439, 16119, 18507, 24477, 34317, 55521, 73431, 102951, 166563, 220293, 252929, 499689, 660879, 758787, 2276361, 6829083, 20487249]

約数ペア:

[(1, 20487249), (3, 6829083), (9, 2276361), (27, 758787), (31, 660879), (41, 499689), (81, 252929), (93, 220293), (123, 166563), (199, 102951), (279, 73431), (369, 55521), (597, 34317), (837, 24477), (1107, 18507), (1271, 16119), (1791, 11439), (2511, 8159), (3321, 6169), (3813, 5373)]