1621720

素因数分解:

$2^3\times 5^1\times {\mathrm{40543}}^1$

素因数の和:40554

約数の個数: 16

約数和(自身を含む): 3648960

約数和(自身を除く): 2027240

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 40543, 81086, 162172, 202715, 324344, 405430, 810860, 1621720]

約数ペア:

[(1, 1621720), (2, 810860), (4, 405430), (5, 324344), (8, 202715), (10, 162172), (20, 81086), (40, 40543)]