21381248

素因数分解:

$2^7\times 7^3\times {\mathrm{487}}^1$

素因数の和:522

約数の個数: 64

約数和(自身を含む): 49776000

約数和(自身を除く): 28394752

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 32, 49, 56, 64, 98, 112, 128, 196, 224, 343, 392, 448, 487, 686, 784, 896, 974, 1372, 1568, 1948, 2744, 3136, 3409, 3896, 5488, 6272, 6818, 7792, 10976, 13636, 15584, 21952, 23863, 27272, 31168, 43904, 47726, 54544, 62336, 95452, 109088, 167041, 190904, 218176, 334082, 381808, 436352, 668164, 763616, 1336328, 1527232, 2672656, 3054464, 5345312, 10690624, 21381248]

約数ペア:

[(1, 21381248), (2, 10690624), (4, 5345312), (7, 3054464), (8, 2672656), (14, 1527232), (16, 1336328), (28, 763616), (32, 668164), (49, 436352), (56, 381808), (64, 334082), (98, 218176), (112, 190904), (128, 167041), (196, 109088), (224, 95452), (343, 62336), (392, 54544), (448, 47726), (487, 43904), (686, 31168), (784, 27272), (896, 23863), (974, 21952), (1372, 15584), (1568, 13636), (1948, 10976), (2744, 7792), (3136, 6818), (3409, 6272), (3896, 5488)]