25663280

素因数分解:

$2^4\times 5^1\times {\mathrm{320791}}^1$

素因数の和:320804

約数の個数: 20

約数和(自身を含む): 59667312

約数和(自身を除く): 34004032

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 320791, 641582, 1283164, 1603955, 2566328, 3207910, 5132656, 6415820, 12831640, 25663280]

約数ペア:

[(1, 25663280), (2, 12831640), (4, 6415820), (5, 5132656), (8, 3207910), (10, 2566328), (16, 1603955), (20, 1283164), (40, 641582), (80, 320791)]