20780051024

素因数分解:

$2^4\times {\mathrm{19}}^1\times {\mathrm{68355431}}^1$

素因数の和:68355458

約数の個数: 20

約数和(自身を含む): 42380367840

約数和(自身を除く): 21600316816

約数列:

[1, 2, 4, 8, 16, 19, 38, 76, 152, 304, 68355431, 136710862, 273421724, 546843448, 1093686896, 1298753189, 2597506378, 5195012756, 10390025512, 20780051024]

約数ペア:

[(1, 20780051024), (2, 10390025512), (4, 5195012756), (8, 2597506378), (16, 1298753189), (19, 1093686896), (38, 546843448), (76, 273421724), (152, 136710862), (304, 68355431)]