129626320

素因数分解:

$2^4\times 5^1\times {\mathrm{1620329}}^1$

素因数の和:1620342

約数の個数: 20

約数和(自身を含む): 301381380

約数和(自身を除く): 171755060

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 1620329, 3240658, 6481316, 8101645, 12962632, 16203290, 25925264, 32406580, 64813160, 129626320]

約数ペア:

[(1, 129626320), (2, 64813160), (4, 32406580), (5, 25925264), (8, 16203290), (10, 12962632), (16, 8101645), (20, 6481316), (40, 3240658), (80, 1620329)]