21241720

素因数分解:

$2^3\times 5^1\times {\mathrm{531043}}^1$

素因数の和:531054

約数の個数: 16

約数和(自身を含む): 47793960

約数和(自身を除く): 26552240

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 531043, 1062086, 2124172, 2655215, 4248344, 5310430, 10620860, 21241720]

約数ペア:

[(1, 21241720), (2, 10620860), (4, 5310430), (5, 4248344), (8, 2655215), (10, 2124172), (20, 1062086), (40, 531043)]