129680

素因数分解:

$2^4\times 5^1\times {\mathrm{1621}}^1$

素因数の和:1634

約数の個数: 20

約数和(自身を含む): 301692

約数和(自身を除く): 172012

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 1621, 3242, 6484, 8105, 12968, 16210, 25936, 32420, 64840, 129680]

約数ペア:

[(1, 129680), (2, 64840), (4, 32420), (5, 25936), (8, 16210), (10, 12968), (16, 8105), (20, 6484), (40, 3242), (80, 1621)]