205168520

素因数分解:

$2^3\times 5^1\times {\mathrm{109}}^1\times {\mathrm{47057}}^1$

素因数の和:47177

約数の個数: 32

約数和(自身を含む): 465874200

約数和(自身を除く): 260705680

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 109, 218, 436, 545, 872, 1090, 2180, 4360, 47057, 94114, 188228, 235285, 376456, 470570, 941140, 1882280, 5129213, 10258426, 20516852, 25646065, 41033704, 51292130, 102584260, 205168520]

約数ペア:

[(1, 205168520), (2, 102584260), (4, 51292130), (5, 41033704), (8, 25646065), (10, 20516852), (20, 10258426), (40, 5129213), (109, 1882280), (218, 941140), (436, 470570), (545, 376456), (872, 235285), (1090, 188228), (2180, 94114), (4360, 47057)]