20993847

素因数分解:

$3^1\times 7^1\times {\mathrm{43}}^1\times {\mathrm{67}}^1\times {\mathrm{347}}^1$

素因数の和:467

約数の個数: 32

約数和(自身を含む): 33318912

約数和(自身を除く): 12325065

約数列:

[1, 3, 7, 21, 43, 67, 129, 201, 301, 347, 469, 903, 1041, 1407, 2429, 2881, 7287, 8643, 14921, 20167, 23249, 44763, 60501, 69747, 104447, 162743, 313341, 488229, 999707, 2999121, 6997949, 20993847]

約数ペア:

[(1, 20993847), (3, 6997949), (7, 2999121), (21, 999707), (43, 488229), (67, 313341), (129, 162743), (201, 104447), (301, 69747), (347, 60501), (469, 44763), (903, 23249), (1041, 20167), (1407, 14921), (2429, 8643), (2881, 7287)]