20521984

素因数分解:

$2^{10}\times 7^2\times {\mathrm{409}}^1$

素因数の和:443

約数の個数: 66

約数和(自身を含む): 47838390

約数和(自身を除く): 27316406

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 32, 49, 56, 64, 98, 112, 128, 196, 224, 256, 392, 409, 448, 512, 784, 818, 896, 1024, 1568, 1636, 1792, 2863, 3136, 3272, 3584, 5726, 6272, 6544, 7168, 11452, 12544, 13088, 20041, 22904, 25088, 26176, 40082, 45808, 50176, 52352, 80164, 91616, 104704, 160328, 183232, 209408, 320656, 366464, 418816, 641312, 732928, 1282624, 1465856, 2565248, 2931712, 5130496, 10260992, 20521984]

約数ペア:

[(1, 20521984), (2, 10260992), (4, 5130496), (7, 2931712), (8, 2565248), (14, 1465856), (16, 1282624), (28, 732928), (32, 641312), (49, 418816), (56, 366464), (64, 320656), (98, 209408), (112, 183232), (128, 160328), (196, 104704), (224, 91616), (256, 80164), (392, 52352), (409, 50176), (448, 45808), (512, 40082), (784, 26176), (818, 25088), (896, 22904), (1024, 20041), (1568, 13088), (1636, 12544), (1792, 11452), (2863, 7168), (3136, 6544), (3272, 6272), (3584, 5726)]