20967520

素因数分解:

$2^5\times 5^1\times 7^1\times {\mathrm{97}}^1\times {\mathrm{193}}^1$

素因数の和:312

約数の個数: 96

約数和(自身を含む): 57492288

約数和(自身を除く): 36524768

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 32, 35, 40, 56, 70, 80, 97, 112, 140, 160, 193, 194, 224, 280, 386, 388, 485, 560, 679, 772, 776, 965, 970, 1120, 1351, 1358, 1544, 1552, 1930, 1940, 2702, 2716, 3088, 3104, 3395, 3860, 3880, 5404, 5432, 6176, 6755, 6790, 7720, 7760, 10808, 10864, 13510, 13580, 15440, 15520, 18721, 21616, 21728, 27020, 27160, 30880, 37442, 43232, 54040, 54320, 74884, 93605, 108080, 108640, 131047, 149768, 187210, 216160, 262094, 299536, 374420, 524188, 599072, 655235, 748840, 1048376, 1310470, 1497680, 2096752, 2620940, 2995360, 4193504, 5241880, 10483760, 20967520]

約数ペア:

[(1, 20967520), (2, 10483760), (4, 5241880), (5, 4193504), (7, 2995360), (8, 2620940), (10, 2096752), (14, 1497680), (16, 1310470), (20, 1048376), (28, 748840), (32, 655235), (35, 599072), (40, 524188), (56, 374420), (70, 299536), (80, 262094), (97, 216160), (112, 187210), (140, 149768), (160, 131047), (193, 108640), (194, 108080), (224, 93605), (280, 74884), (386, 54320), (388, 54040), (485, 43232), (560, 37442), (679, 30880), (772, 27160), (776, 27020), (965, 21728), (970, 21616), (1120, 18721), (1351, 15520), (1358, 15440), (1544, 13580), (1552, 13510), (1930, 10864), (1940, 10808), (2702, 7760), (2716, 7720), (3088, 6790), (3104, 6755), (3395, 6176), (3860, 5432), (3880, 5404)]