65551280

素因数分解:

$2^4\times 5^1\times {\mathrm{819391}}^1$

素因数の和:819404

約数の個数: 20

約数和(自身を含む): 152406912

約数和(自身を除く): 86855632

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 819391, 1638782, 3277564, 4096955, 6555128, 8193910, 13110256, 16387820, 32775640, 65551280]

約数ペア:

[(1, 65551280), (2, 32775640), (4, 16387820), (5, 13110256), (8, 8193910), (10, 6555128), (16, 4096955), (20, 3277564), (40, 1638782), (80, 819391)]