261215440

素因数分解:

$2^4\times 5^1\times {\mathrm{337}}^1\times {\mathrm{9689}}^1$

素因数の和:10039

約数の個数: 40

約数和(自身を含む): 609190920

約数和(自身を除く): 347975480

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 337, 674, 1348, 1685, 2696, 3370, 5392, 6740, 9689, 13480, 19378, 26960, 38756, 48445, 77512, 96890, 155024, 193780, 387560, 775120, 3265193, 6530386, 13060772, 16325965, 26121544, 32651930, 52243088, 65303860, 130607720, 261215440]

約数ペア:

[(1, 261215440), (2, 130607720), (4, 65303860), (5, 52243088), (8, 32651930), (10, 26121544), (16, 16325965), (20, 13060772), (40, 6530386), (80, 3265193), (337, 775120), (674, 387560), (1348, 193780), (1685, 155024), (2696, 96890), (3370, 77512), (5392, 48445), (6740, 38756), (9689, 26960), (13480, 19378)]