19911568

素因数分解:

$2^4\times {\mathrm{41}}^1\times {\mathrm{127}}^1\times {\mathrm{239}}^1$

素因数の和:415

約数の個数: 40

約数和(自身を含む): 39997440

約数和(自身を除く): 20085872

約数列:

[1, 2, 4, 8, 16, 41, 82, 127, 164, 239, 254, 328, 478, 508, 656, 956, 1016, 1912, 2032, 3824, 5207, 9799, 10414, 19598, 20828, 30353, 39196, 41656, 60706, 78392, 83312, 121412, 156784, 242824, 485648, 1244473, 2488946, 4977892, 9955784, 19911568]

約数ペア:

[(1, 19911568), (2, 9955784), (4, 4977892), (8, 2488946), (16, 1244473), (41, 485648), (82, 242824), (127, 156784), (164, 121412), (239, 83312), (254, 78392), (328, 60706), (478, 41656), (508, 39196), (656, 30353), (956, 20828), (1016, 19598), (1912, 10414), (2032, 9799), (3824, 5207)]