128215720

素因数分解:

$2^3\times 5^1\times {\mathrm{3205393}}^1$

素因数の和:3205404

約数の個数: 16

約数和(自身を含む): 288485460

約数和(自身を除く): 160269740

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 3205393, 6410786, 12821572, 16026965, 25643144, 32053930, 64107860, 128215720]

約数ペア:

[(1, 128215720), (2, 64107860), (4, 32053930), (5, 25643144), (8, 16026965), (10, 12821572), (20, 6410786), (40, 3205393)]