20872820

素因数分解:

$2^2\times 5^1\times {\mathrm{487}}^1\times {\mathrm{2143}}^1$

素因数の和:2639

約数の個数: 24

約数和(自身を含む): 43943424

約数和(自身を除く): 23070604

約数列:

[1, 2, 4, 5, 10, 20, 487, 974, 1948, 2143, 2435, 4286, 4870, 8572, 9740, 10715, 21430, 42860, 1043641, 2087282, 4174564, 5218205, 10436410, 20872820]

約数ペア:

[(1, 20872820), (2, 10436410), (4, 5218205), (5, 4174564), (10, 2087282), (20, 1043641), (487, 42860), (974, 21430), (1948, 10715), (2143, 9740), (2435, 8572), (4286, 4870)]