21132580

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{271}}^1\times {\mathrm{557}}^1$

素因数の和:844

約数の個数: 48

約数和(自身を含む): 50996736

約数和(自身を除く): 29864156

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 271, 542, 557, 1084, 1114, 1355, 1897, 2228, 2710, 2785, 3794, 3899, 5420, 5570, 7588, 7798, 9485, 11140, 15596, 18970, 19495, 37940, 38990, 77980, 150947, 301894, 603788, 754735, 1056629, 1509470, 2113258, 3018940, 4226516, 5283145, 10566290, 21132580]

約数ペア:

[(1, 21132580), (2, 10566290), (4, 5283145), (5, 4226516), (7, 3018940), (10, 2113258), (14, 1509470), (20, 1056629), (28, 754735), (35, 603788), (70, 301894), (140, 150947), (271, 77980), (542, 38990), (557, 37940), (1084, 19495), (1114, 18970), (1355, 15596), (1897, 11140), (2228, 9485), (2710, 7798), (2785, 7588), (3794, 5570), (3899, 5420)]