209985140

素因数分解:

$2^2\times 5^1\times {\mathrm{131}}^1\times {\mathrm{80147}}^1$

素因数の和:80287

約数の個数: 24

約数和(自身を含む): 444340512

約数和(自身を除く): 234355372

約数列:

[1, 2, 4, 5, 10, 20, 131, 262, 524, 655, 1310, 2620, 80147, 160294, 320588, 400735, 801470, 1602940, 10499257, 20998514, 41997028, 52496285, 104992570, 209985140]

約数ペア:

[(1, 209985140), (2, 104992570), (4, 52496285), (5, 41997028), (10, 20998514), (20, 10499257), (131, 1602940), (262, 801470), (524, 400735), (655, 320588), (1310, 160294), (2620, 80147)]