21076405

素因数分解:

$5^1\times 7^1\times {\mathrm{281}}^1\times {\mathrm{2143}}^1$

素因数の和:2436

約数の個数: 16

約数和(自身を含む): 29021184

約数和(自身を除く): 7944779

約数列:

[1, 5, 7, 35, 281, 1405, 1967, 2143, 9835, 10715, 15001, 75005, 602183, 3010915, 4215281, 21076405]

約数ペア:

[(1, 21076405), (5, 4215281), (7, 3010915), (35, 602183), (281, 75005), (1405, 15001), (1967, 10715), (2143, 9835)]