21013888

素因数分解:

$2^7\times 7^1\times {\mathrm{47}}^1\times {\mathrm{499}}^1$

素因数の和:567

約数の個数: 64

約数和(自身を含む): 48960000

約数和(自身を除く): 27946112

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 32, 47, 56, 64, 94, 112, 128, 188, 224, 329, 376, 448, 499, 658, 752, 896, 998, 1316, 1504, 1996, 2632, 3008, 3493, 3992, 5264, 6016, 6986, 7984, 10528, 13972, 15968, 21056, 23453, 27944, 31936, 42112, 46906, 55888, 63872, 93812, 111776, 164171, 187624, 223552, 328342, 375248, 447104, 656684, 750496, 1313368, 1500992, 2626736, 3001984, 5253472, 10506944, 21013888]

約数ペア:

[(1, 21013888), (2, 10506944), (4, 5253472), (7, 3001984), (8, 2626736), (14, 1500992), (16, 1313368), (28, 750496), (32, 656684), (47, 447104), (56, 375248), (64, 328342), (94, 223552), (112, 187624), (128, 164171), (188, 111776), (224, 93812), (329, 63872), (376, 55888), (448, 46906), (499, 42112), (658, 31936), (752, 27944), (896, 23453), (998, 21056), (1316, 15968), (1504, 13972), (1996, 10528), (2632, 7984), (3008, 6986), (3493, 6016), (3992, 5264)]