20985080

素因数分解:

$2^3\times 5^1\times {\mathrm{281}}^1\times {\mathrm{1867}}^1$

素因数の和:2159

約数の個数: 32

約数和(自身を含む): 47409840

約数和(自身を除く): 26424760

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 281, 562, 1124, 1405, 1867, 2248, 2810, 3734, 5620, 7468, 9335, 11240, 14936, 18670, 37340, 74680, 524627, 1049254, 2098508, 2623135, 4197016, 5246270, 10492540, 20985080]

約数ペア:

[(1, 20985080), (2, 10492540), (4, 5246270), (5, 4197016), (8, 2623135), (10, 2098508), (20, 1049254), (40, 524627), (281, 74680), (562, 37340), (1124, 18670), (1405, 14936), (1867, 11240), (2248, 9335), (2810, 7468), (3734, 5620)]