128800960

素因数分解:

$2^6\times 5^1\times {\mathrm{402503}}^1$

素因数の和:402520

約数の個数: 28

約数和(自身を含む): 306708048

約数和(自身を除く): 177907088

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 160, 320, 402503, 805006, 1610012, 2012515, 3220024, 4025030, 6440048, 8050060, 12880096, 16100120, 25760192, 32200240, 64400480, 128800960]

約数ペア:

[(1, 128800960), (2, 64400480), (4, 32200240), (5, 25760192), (8, 16100120), (10, 12880096), (16, 8050060), (20, 6440048), (32, 4025030), (40, 3220024), (64, 2012515), (80, 1610012), (160, 805006), (320, 402503)]