81065420

素因数分解:

$2^2\times 5^1\times {\mathrm{131}}^1\times {\mathrm{30941}}^1$

素因数の和:31081

約数の個数: 24

約数和(自身を含む): 171542448

約数和(自身を除く): 90477028

約数列:

[1, 2, 4, 5, 10, 20, 131, 262, 524, 655, 1310, 2620, 30941, 61882, 123764, 154705, 309410, 618820, 4053271, 8106542, 16213084, 20266355, 40532710, 81065420]

約数ペア:

[(1, 81065420), (2, 40532710), (4, 20266355), (5, 16213084), (10, 8106542), (20, 4053271), (131, 618820), (262, 309410), (524, 154705), (655, 123764), (1310, 61882), (2620, 30941)]