21505720

素因数分解:

$2^3\times 5^1\times {\mathrm{19}}^1\times {\mathrm{28297}}^1$

素因数の和:28327

約数の個数: 32

約数和(自身を含む): 50936400

約数和(自身を除く): 29430680

約数列:

[1, 2, 4, 5, 8, 10, 19, 20, 38, 40, 76, 95, 152, 190, 380, 760, 28297, 56594, 113188, 141485, 226376, 282970, 537643, 565940, 1075286, 1131880, 2150572, 2688215, 4301144, 5376430, 10752860, 21505720]

約数ペア:

[(1, 21505720), (2, 10752860), (4, 5376430), (5, 4301144), (8, 2688215), (10, 2150572), (19, 1131880), (20, 1075286), (38, 565940), (40, 537643), (76, 282970), (95, 226376), (152, 141485), (190, 113188), (380, 56594), (760, 28297)]