1285391320

素因数分解:

$2^3\times 5^1\times {\mathrm{653}}^1\times {\mathrm{49211}}^1$

素因数の和:49875

約数の個数: 32

約数和(自身を含む): 2896618320

約数和(自身を除く): 1611227000

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 653, 1306, 2612, 3265, 5224, 6530, 13060, 26120, 49211, 98422, 196844, 246055, 393688, 492110, 984220, 1968440, 32134783, 64269566, 128539132, 160673915, 257078264, 321347830, 642695660, 1285391320]

約数ペア:

[(1, 1285391320), (2, 642695660), (4, 321347830), (5, 257078264), (8, 160673915), (10, 128539132), (20, 64269566), (40, 32134783), (653, 1968440), (1306, 984220), (2612, 492110), (3265, 393688), (5224, 246055), (6530, 196844), (13060, 98422), (26120, 49211)]