128789780

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{919927}}^1$

素因数の和:919943

約数の個数: 24

約数和(自身を含む): 309095808

約数和(自身を除く): 180306028

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 919927, 1839854, 3679708, 4599635, 6439489, 9199270, 12878978, 18398540, 25757956, 32197445, 64394890, 128789780]

約数ペア:

[(1, 128789780), (2, 64394890), (4, 32197445), (5, 25757956), (7, 18398540), (10, 12878978), (14, 9199270), (20, 6439489), (28, 4599635), (35, 3679708), (70, 1839854), (140, 919927)]