21863780

素因数分解:

$2^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{25423}}^1$

素因数の和:25475

約数の個数: 24

約数和(自身を含む): 46983552

約数和(自身を除く): 25119772

約数列:

[1, 2, 4, 5, 10, 20, 43, 86, 172, 215, 430, 860, 25423, 50846, 101692, 127115, 254230, 508460, 1093189, 2186378, 4372756, 5465945, 10931890, 21863780]

約数ペア:

[(1, 21863780), (2, 10931890), (4, 5465945), (5, 4372756), (10, 2186378), (20, 1093189), (43, 508460), (86, 254230), (172, 127115), (215, 101692), (430, 50846), (860, 25423)]