80197970

素因数分解:

$2^1\times 5^1\times {\mathrm{397}}^1\times {\mathrm{20201}}^1$

素因数の和:20605

約数の個数: 16

約数和(自身を含む): 144727128

約数和(自身を除く): 64529158

約数列:

[1, 2, 5, 10, 397, 794, 1985, 3970, 20201, 40402, 101005, 202010, 8019797, 16039594, 40098985, 80197970]

約数ペア:

[(1, 80197970), (2, 40098985), (5, 16039594), (10, 8019797), (397, 202010), (794, 101005), (1985, 40402), (3970, 20201)]