129400

素因数分解:

$2^3\times 5^2\times {\mathrm{647}}^1$

素因数の和:663

約数の個数: 24

約数和(自身を含む): 301320

約数和(自身を除く): 171920

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 100, 200, 647, 1294, 2588, 3235, 5176, 6470, 12940, 16175, 25880, 32350, 64700, 129400]

約数ペア:

[(1, 129400), (2, 64700), (4, 32350), (5, 25880), (8, 16175), (10, 12940), (20, 6470), (25, 5176), (40, 3235), (50, 2588), (100, 1294), (200, 647)]