20858140

素因数分解:

$2^2\times 5^1\times {\mathrm{641}}^1\times {\mathrm{1627}}^1$

素因数の和:2277

約数の個数: 24

約数和(自身を含む): 43897392

約数和(自身を除く): 23039252

約数列:

[1, 2, 4, 5, 10, 20, 641, 1282, 1627, 2564, 3205, 3254, 6410, 6508, 8135, 12820, 16270, 32540, 1042907, 2085814, 4171628, 5214535, 10429070, 20858140]

約数ペア:

[(1, 20858140), (2, 10429070), (4, 5214535), (5, 4171628), (10, 2085814), (20, 1042907), (641, 32540), (1282, 16270), (1627, 12820), (2564, 8135), (3205, 6508), (3254, 6410)]