19991567267

素因数分解:

$7^1\times {\mathrm{43}}^1\times {\mathrm{67}}^1\times {\mathrm{631}}^1\times {\mathrm{1571}}^1$

素因数の和:2319

約数の個数: 32

約数和(自身を含む): 23780511744

約数和(自身を除く): 3788944477

約数列:

[1, 7, 43, 67, 301, 469, 631, 1571, 2881, 4417, 10997, 20167, 27133, 42277, 67553, 105257, 189931, 295939, 472871, 736799, 991301, 1817911, 4526051, 6939107, 12725377, 31682357, 42625943, 66417167, 298381601, 464920169, 2855938181, 19991567267]

約数ペア:

[(1, 19991567267), (7, 2855938181), (43, 464920169), (67, 298381601), (301, 66417167), (469, 42625943), (631, 31682357), (1571, 12725377), (2881, 6939107), (4417, 4526051), (10997, 1817911), (20167, 991301), (27133, 736799), (42277, 472871), (67553, 295939), (105257, 189931)]