642760240

素因数分解:

$2^4\times 5^1\times {\mathrm{8034503}}^1$

素因数の和:8034516

約数の個数: 20

約数和(自身を含む): 1494417744

約数和(自身を除く): 851657504

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 8034503, 16069006, 32138012, 40172515, 64276024, 80345030, 128552048, 160690060, 321380120, 642760240]

約数ペア:

[(1, 642760240), (2, 321380120), (4, 160690060), (5, 128552048), (8, 80345030), (10, 64276024), (16, 40172515), (20, 32138012), (40, 16069006), (80, 8034503)]