21001720

素因数分解:

$2^3\times 5^1\times {\mathrm{525043}}^1$

素因数の和:525054

約数の個数: 16

約数和(自身を含む): 47253960

約数和(自身を除く): 26252240

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 525043, 1050086, 2100172, 2625215, 4200344, 5250430, 10500860, 21001720]

約数ペア:

[(1, 21001720), (2, 10500860), (4, 5250430), (5, 4200344), (8, 2625215), (10, 2100172), (20, 1050086), (40, 525043)]