161217920

素因数分解:

$2^7\times 5^1\times {\mathrm{251903}}^1$

素因数の和:251922

約数の個数: 32

約数和(自身を含む): 385413120

約数和(自身を除く): 224195200

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 320, 640, 251903, 503806, 1007612, 1259515, 2015224, 2519030, 4030448, 5038060, 8060896, 10076120, 16121792, 20152240, 32243584, 40304480, 80608960, 161217920]

約数ペア:

[(1, 161217920), (2, 80608960), (4, 40304480), (5, 32243584), (8, 20152240), (10, 16121792), (16, 10076120), (20, 8060896), (32, 5038060), (40, 4030448), (64, 2519030), (80, 2015224), (128, 1259515), (160, 1007612), (320, 503806), (640, 251903)]