217494280

素因数分解:

$2^3\times 5^1\times {\mathrm{61}}^1\times {\mathrm{89137}}^1$

素因数の和:89209

約数の個数: 32

約数和(自身を含む): 497390040

約数和(自身を除く): 279895760

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 61, 122, 244, 305, 488, 610, 1220, 2440, 89137, 178274, 356548, 445685, 713096, 891370, 1782740, 3565480, 5437357, 10874714, 21749428, 27186785, 43498856, 54373570, 108747140, 217494280]

約数ペア:

[(1, 217494280), (2, 108747140), (4, 54373570), (5, 43498856), (8, 27186785), (10, 21749428), (20, 10874714), (40, 5437357), (61, 3565480), (122, 1782740), (244, 891370), (305, 713096), (488, 445685), (610, 356548), (1220, 178274), (2440, 89137)]