81409840

素因数分解:

$2^4\times 5^1\times {\mathrm{1017623}}^1$

素因数の和:1017636

約数の個数: 20

約数和(自身を含む): 189278064

約数和(自身を除く): 107868224

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 1017623, 2035246, 4070492, 5088115, 8140984, 10176230, 16281968, 20352460, 40704920, 81409840]

約数ペア:

[(1, 81409840), (2, 40704920), (4, 20352460), (5, 16281968), (8, 10176230), (10, 8140984), (16, 5088115), (20, 4070492), (40, 2035246), (80, 1017623)]