64641880

素因数分解:

$2^3\times 5^1\times {\mathrm{1616047}}^1$

素因数の和:1616058

約数の個数: 16

約数和(自身を含む): 145444320

約数和(自身を除く): 80802440

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 1616047, 3232094, 6464188, 8080235, 12928376, 16160470, 32320940, 64641880]

約数ペア:

[(1, 64641880), (2, 32320940), (4, 16160470), (5, 12928376), (8, 8080235), (10, 6464188), (20, 3232094), (40, 1616047)]