21993554

素因数分解:

$2^1\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{67}}^1\times {\mathrm{347}}^1$

素因数の和:470

約数の個数: 32

約数和(自身を含む): 37483776

約数和(自身を除く): 15490222

約数列:

[1, 2, 11, 22, 43, 67, 86, 134, 347, 473, 694, 737, 946, 1474, 2881, 3817, 5762, 7634, 14921, 23249, 29842, 31691, 46498, 63382, 164131, 255739, 328262, 511478, 999707, 1999414, 10996777, 21993554]

約数ペア:

[(1, 21993554), (2, 10996777), (11, 1999414), (22, 999707), (43, 511478), (67, 328262), (86, 255739), (134, 164131), (347, 63382), (473, 46498), (694, 31691), (737, 29842), (946, 23249), (1474, 14921), (2881, 7634), (3817, 5762)]