20728185

素因数分解:

$3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{29}}^1\times {\mathrm{2803}}^1$

素因数の和:2857

約数の個数: 32

約数和(自身を含む): 36339840

約数和(自身を除く): 15611655

約数列:

[1, 3, 5, 15, 17, 29, 51, 85, 87, 145, 255, 435, 493, 1479, 2465, 2803, 7395, 8409, 14015, 42045, 47651, 81287, 142953, 238255, 243861, 406435, 714765, 1219305, 1381879, 4145637, 6909395, 20728185]

約数ペア:

[(1, 20728185), (3, 6909395), (5, 4145637), (15, 1381879), (17, 1219305), (29, 714765), (51, 406435), (85, 243861), (87, 238255), (145, 142953), (255, 81287), (435, 47651), (493, 42045), (1479, 14015), (2465, 8409), (2803, 7395)]