21869420

素因数分解:

$2^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{15401}}^1$

素因数の和:15481

約数の個数: 24

約数和(自身を含む): 46575648

約数和(自身を除く): 24706228

約数列:

[1, 2, 4, 5, 10, 20, 71, 142, 284, 355, 710, 1420, 15401, 30802, 61604, 77005, 154010, 308020, 1093471, 2186942, 4373884, 5467355, 10934710, 21869420]

約数ペア:

[(1, 21869420), (2, 10934710), (4, 5467355), (5, 4373884), (10, 2186942), (20, 1093471), (71, 308020), (142, 154010), (284, 77005), (355, 61604), (710, 30802), (1420, 15401)]