20641220

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{54319}}^1$

素因数の和:54347

約数の個数: 24

約数和(自身を含む): 45628800

約数和(自身を除く): 24987580

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 76, 95, 190, 380, 54319, 108638, 217276, 271595, 543190, 1032061, 1086380, 2064122, 4128244, 5160305, 10320610, 20641220]

約数ペア:

[(1, 20641220), (2, 10320610), (4, 5160305), (5, 4128244), (10, 2064122), (19, 1086380), (20, 1032061), (38, 543190), (76, 271595), (95, 217276), (190, 108638), (380, 54319)]