128468240

素因数分解:

$2^4\times 5^1\times {\mathrm{1605853}}^1$

素因数の和:1605866

約数の個数: 20

約数和(自身を含む): 298688844

約数和(自身を除く): 170220604

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 1605853, 3211706, 6423412, 8029265, 12846824, 16058530, 25693648, 32117060, 64234120, 128468240]

約数ペア:

[(1, 128468240), (2, 64234120), (4, 32117060), (5, 25693648), (8, 16058530), (10, 12846824), (16, 8029265), (20, 6423412), (40, 3211706), (80, 1605853)]