21055790

素因数分解:

$2^1\times 5^1\times 7^2\times {\mathrm{97}}^1\times {\mathrm{443}}^1$

素因数の和:561

約数の個数: 48

約数和(自身を含む): 44643312

約数和(自身を除く): 23587522

約数列:

[1, 2, 5, 7, 10, 14, 35, 49, 70, 97, 98, 194, 245, 443, 485, 490, 679, 886, 970, 1358, 2215, 3101, 3395, 4430, 4753, 6202, 6790, 9506, 15505, 21707, 23765, 31010, 42971, 43414, 47530, 85942, 108535, 214855, 217070, 300797, 429710, 601594, 1503985, 2105579, 3007970, 4211158, 10527895, 21055790]

約数ペア:

[(1, 21055790), (2, 10527895), (5, 4211158), (7, 3007970), (10, 2105579), (14, 1503985), (35, 601594), (49, 429710), (70, 300797), (97, 217070), (98, 214855), (194, 108535), (245, 85942), (443, 47530), (485, 43414), (490, 42971), (679, 31010), (886, 23765), (970, 21707), (1358, 15505), (2215, 9506), (3101, 6790), (3395, 6202), (4430, 4753)]