81032780

素因数分解:

$2^2\times 5^1\times {\mathrm{109}}^1\times {\mathrm{37171}}^1$

素因数の和:37289

約数の個数: 24

約数和(自身を含む): 171734640

約数和(自身を除く): 90701860

約数列:

[1, 2, 4, 5, 10, 20, 109, 218, 436, 545, 1090, 2180, 37171, 74342, 148684, 185855, 371710, 743420, 4051639, 8103278, 16206556, 20258195, 40516390, 81032780]

約数ペア:

[(1, 81032780), (2, 40516390), (4, 20258195), (5, 16206556), (10, 8103278), (20, 4051639), (109, 743420), (218, 371710), (436, 185855), (545, 148684), (1090, 74342), (2180, 37171)]