25570297880

素因数分解:

$2^3\times 5^1\times {\mathrm{639257447}}^1$

素因数の和:639257458

約数の個数: 16

約数和(自身を含む): 57533170320

約数和(自身を除く): 31962872440

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 639257447, 1278514894, 2557029788, 3196287235, 5114059576, 6392574470, 12785148940, 25570297880]

約数ペア:

[(1, 25570297880), (2, 12785148940), (4, 6392574470), (5, 5114059576), (8, 3196287235), (10, 2557029788), (20, 1278514894), (40, 639257447)]