649702923280

素因数分解:

$2^4\times 5^1\times {\mathrm{8121286541}}^1$

素因数の和:8121286554

約数の個数: 20

約数和(自身を含む): 1510559296812

約数和(自身を除く): 860856373532

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 8121286541, 16242573082, 32485146164, 40606432705, 64970292328, 81212865410, 129940584656, 162425730820, 324851461640, 649702923280]

約数ペア:

[(1, 649702923280), (2, 324851461640), (4, 162425730820), (5, 129940584656), (8, 81212865410), (10, 64970292328), (16, 40606432705), (20, 32485146164), (40, 16242573082), (80, 8121286541)]