12457840

素因数分解:

$2^4\times 5^1\times {\mathrm{155723}}^1$

素因数の和:155736

約数の個数: 20

約数和(自身を含む): 28964664

約数和(自身を除く): 16506824

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 155723, 311446, 622892, 778615, 1245784, 1557230, 2491568, 3114460, 6228920, 12457840]

約数ペア:

[(1, 12457840), (2, 6228920), (4, 3114460), (5, 2491568), (8, 1557230), (10, 1245784), (16, 778615), (20, 622892), (40, 311446), (80, 155723)]