278880280

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{996001}}^1$

素因数の和:996019

約数の個数: 32

約数和(自身を含む): 717121440

約数和(自身を除く): 438241160

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 996001, 1992002, 3984004, 4980005, 6972007, 7968008, 9960010, 13944014, 19920020, 27888028, 34860035, 39840040, 55776056, 69720070, 139440140, 278880280]

約数ペア:

[(1, 278880280), (2, 139440140), (4, 69720070), (5, 55776056), (7, 39840040), (8, 34860035), (10, 27888028), (14, 19920020), (20, 13944014), (28, 9960010), (35, 7968008), (40, 6972007), (56, 4980005), (70, 3984004), (140, 1992002), (280, 996001)]