19919870

素因数分解:

$2^1\times 5^1\times {\mathrm{491}}^1\times {\mathrm{4057}}^1$

素因数の和:4555

約数の個数: 16

約数和(自身を含む): 35937648

約数和(自身を除く): 16017778

約数列:

[1, 2, 5, 10, 491, 982, 2455, 4057, 4910, 8114, 20285, 40570, 1991987, 3983974, 9959935, 19919870]

約数ペア:

[(1, 19919870), (2, 9959935), (5, 3983974), (10, 1991987), (491, 40570), (982, 20285), (2455, 8114), (4057, 4910)]