21389984

素因数分解:

$2^5\times 7^1\times {\mathrm{11}}^1\times {\mathrm{8681}}^1$

素因数の和:8709

約数の個数: 48

約数和(自身を含む): 52508736

約数和(自身を除く): 31118752

約数列:

[1, 2, 4, 7, 8, 11, 14, 16, 22, 28, 32, 44, 56, 77, 88, 112, 154, 176, 224, 308, 352, 616, 1232, 2464, 8681, 17362, 34724, 60767, 69448, 95491, 121534, 138896, 190982, 243068, 277792, 381964, 486136, 668437, 763928, 972272, 1336874, 1527856, 1944544, 2673748, 3055712, 5347496, 10694992, 21389984]

約数ペア:

[(1, 21389984), (2, 10694992), (4, 5347496), (7, 3055712), (8, 2673748), (11, 1944544), (14, 1527856), (16, 1336874), (22, 972272), (28, 763928), (32, 668437), (44, 486136), (56, 381964), (77, 277792), (88, 243068), (112, 190982), (154, 138896), (176, 121534), (224, 95491), (308, 69448), (352, 60767), (616, 34724), (1232, 17362), (2464, 8681)]