12781540

素因数分解:

$2^2\times 5^1\times {\mathrm{641}}^1\times {\mathrm{997}}^1$

素因数の和:1647

約数の個数: 24

約数和(自身を含む): 26910072

約数和(自身を除く): 14128532

約数列:

[1, 2, 4, 5, 10, 20, 641, 997, 1282, 1994, 2564, 3205, 3988, 4985, 6410, 9970, 12820, 19940, 639077, 1278154, 2556308, 3195385, 6390770, 12781540]

約数ペア:

[(1, 12781540), (2, 6390770), (4, 3195385), (5, 2556308), (10, 1278154), (20, 639077), (641, 19940), (997, 12820), (1282, 9970), (1994, 6410), (2564, 4985), (3205, 3988)]