81740180

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{131839}}^1$

素因数の和:131879

約数の個数: 24

約数和(自身を含む): 177192960

約数和(自身を除く): 95452780

約数列:

[1, 2, 4, 5, 10, 20, 31, 62, 124, 155, 310, 620, 131839, 263678, 527356, 659195, 1318390, 2636780, 4087009, 8174018, 16348036, 20435045, 40870090, 81740180]

約数ペア:

[(1, 81740180), (2, 40870090), (4, 20435045), (5, 16348036), (10, 8174018), (20, 4087009), (31, 2636780), (62, 1318390), (124, 659195), (155, 527356), (310, 263678), (620, 131839)]