21284420

素因数分解:

$2^2\times 5^1\times {\mathrm{47}}^1\times {\mathrm{22643}}^1$

素因数の和:22699

約数の個数: 24

約数和(自身を含む): 45650304

約数和(自身を除く): 24365884

約数列:

[1, 2, 4, 5, 10, 20, 47, 94, 188, 235, 470, 940, 22643, 45286, 90572, 113215, 226430, 452860, 1064221, 2128442, 4256884, 5321105, 10642210, 21284420]

約数ペア:

[(1, 21284420), (2, 10642210), (4, 5321105), (5, 4256884), (10, 2128442), (20, 1064221), (47, 452860), (94, 226430), (188, 113215), (235, 90572), (470, 45286), (940, 22643)]