28657664

素因数分解:

$2^{11}\times 7^1\times {\mathrm{1999}}^1$

素因数の和:2028

約数の個数: 48

約数和(自身を含む): 65520000

約数和(自身を除く): 36862336

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 32, 56, 64, 112, 128, 224, 256, 448, 512, 896, 1024, 1792, 1999, 2048, 3584, 3998, 7168, 7996, 13993, 14336, 15992, 27986, 31984, 55972, 63968, 111944, 127936, 223888, 255872, 447776, 511744, 895552, 1023488, 1791104, 2046976, 3582208, 4093952, 7164416, 14328832, 28657664]

約数ペア:

[(1, 28657664), (2, 14328832), (4, 7164416), (7, 4093952), (8, 3582208), (14, 2046976), (16, 1791104), (28, 1023488), (32, 895552), (56, 511744), (64, 447776), (112, 255872), (128, 223888), (224, 127936), (256, 111944), (448, 63968), (512, 55972), (896, 31984), (1024, 27986), (1792, 15992), (1999, 14336), (2048, 13993), (3584, 7996), (3998, 7168)]