20420145

素因数分解:

$3^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{26693}}^1$

素因数の和:26721

約数の個数: 24

約数和(自身を含む): 37478376

約数和(自身を除く): 17058231

約数列:

[1, 3, 5, 9, 15, 17, 45, 51, 85, 153, 255, 765, 26693, 80079, 133465, 240237, 400395, 453781, 1201185, 1361343, 2268905, 4084029, 6806715, 20420145]

約数ペア:

[(1, 20420145), (3, 6806715), (5, 4084029), (9, 2268905), (15, 1361343), (17, 1201185), (45, 453781), (51, 400395), (85, 240237), (153, 133465), (255, 80079), (765, 26693)]