21379456

素因数分解:

$2^7\times 7^1\times {\mathrm{107}}^1\times {\mathrm{223}}^1$

素因数の和:351

約数の個数: 64

約数和(自身を含む): 49351680

約数和(自身を除く): 27972224

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 32, 56, 64, 107, 112, 128, 214, 223, 224, 428, 446, 448, 749, 856, 892, 896, 1498, 1561, 1712, 1784, 2996, 3122, 3424, 3568, 5992, 6244, 6848, 7136, 11984, 12488, 13696, 14272, 23861, 23968, 24976, 28544, 47722, 47936, 49952, 95444, 95872, 99904, 167027, 190888, 199808, 334054, 381776, 668108, 763552, 1336216, 1527104, 2672432, 3054208, 5344864, 10689728, 21379456]

約数ペア:

[(1, 21379456), (2, 10689728), (4, 5344864), (7, 3054208), (8, 2672432), (14, 1527104), (16, 1336216), (28, 763552), (32, 668108), (56, 381776), (64, 334054), (107, 199808), (112, 190888), (128, 167027), (214, 99904), (223, 95872), (224, 95444), (428, 49952), (446, 47936), (448, 47722), (749, 28544), (856, 24976), (892, 23968), (896, 23861), (1498, 14272), (1561, 13696), (1712, 12488), (1784, 11984), (2996, 7136), (3122, 6848), (3424, 6244), (3568, 5992)]