81149620

素因数分解:

$2^2\times 5^1\times {\mathrm{977}}^1\times {\mathrm{4153}}^1$

素因数の和:5139

約数の個数: 24

約数和(自身を含む): 170629704

約数和(自身を除く): 89480084

約数列:

[1, 2, 4, 5, 10, 20, 977, 1954, 3908, 4153, 4885, 8306, 9770, 16612, 19540, 20765, 41530, 83060, 4057481, 8114962, 16229924, 20287405, 40574810, 81149620]

約数ペア:

[(1, 81149620), (2, 40574810), (4, 20287405), (5, 16229924), (10, 8114962), (20, 4057481), (977, 83060), (1954, 41530), (3908, 20765), (4153, 19540), (4885, 16612), (8306, 9770)]