99978640

素因数分解:

$2^4\times 5^1\times {\mathrm{1249733}}^1$

素因数の和:1249746

約数の個数: 20

約数和(自身を含む): 232450524

約数和(自身を除く): 132471884

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 1249733, 2499466, 4998932, 6248665, 9997864, 12497330, 19995728, 24994660, 49989320, 99978640]

約数ペア:

[(1, 99978640), (2, 49989320), (4, 24994660), (5, 19995728), (8, 12497330), (10, 9997864), (16, 6248665), (20, 4998932), (40, 2499466), (80, 1249733)]