81657856

素因数分解:

$2^{17}\times 7^1\times {\mathrm{89}}^1$

素因数の和:130

約数の個数: 72

約数和(自身を含む): 188742960

約数和(自身を除く): 107085104

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 32, 56, 64, 89, 112, 128, 178, 224, 256, 356, 448, 512, 623, 712, 896, 1024, 1246, 1424, 1792, 2048, 2492, 2848, 3584, 4096, 4984, 5696, 7168, 8192, 9968, 11392, 14336, 16384, 19936, 22784, 28672, 32768, 39872, 45568, 57344, 65536, 79744, 91136, 114688, 131072, 159488, 182272, 229376, 318976, 364544, 458752, 637952, 729088, 917504, 1275904, 1458176, 2551808, 2916352, 5103616, 5832704, 10207232, 11665408, 20414464, 40828928, 81657856]

約数ペア:

[(1, 81657856), (2, 40828928), (4, 20414464), (7, 11665408), (8, 10207232), (14, 5832704), (16, 5103616), (28, 2916352), (32, 2551808), (56, 1458176), (64, 1275904), (89, 917504), (112, 729088), (128, 637952), (178, 458752), (224, 364544), (256, 318976), (356, 229376), (448, 182272), (512, 159488), (623, 131072), (712, 114688), (896, 91136), (1024, 79744), (1246, 65536), (1424, 57344), (1792, 45568), (2048, 39872), (2492, 32768), (2848, 28672), (3584, 22784), (4096, 19936), (4984, 16384), (5696, 14336), (7168, 11392), (8192, 9968)]