398889280

素因数分解:

$2^6\times 5^1\times {\mathrm{1246529}}^1$

素因数の和:1246546

約数の個数: 28

約数和(自身を含む): 949855860

約数和(自身を除く): 550966580

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 160, 320, 1246529, 2493058, 4986116, 6232645, 9972232, 12465290, 19944464, 24930580, 39888928, 49861160, 79777856, 99722320, 199444640, 398889280]

約数ペア:

[(1, 398889280), (2, 199444640), (4, 99722320), (5, 79777856), (8, 49861160), (10, 39888928), (16, 24930580), (20, 19944464), (32, 12465290), (40, 9972232), (64, 6232645), (80, 4986116), (160, 2493058), (320, 1246529)]