21987262

素因数分解:

$2^1\times {\mathrm{11}}^1\times {\mathrm{53}}^1\times {\mathrm{109}}^1\times {\mathrm{173}}^1$

素因数の和:348

約数の個数: 32

約数和(自身を含む): 37208160

約数和(自身を除く): 15220898

約数列:

[1, 2, 11, 22, 53, 106, 109, 173, 218, 346, 583, 1166, 1199, 1903, 2398, 3806, 5777, 9169, 11554, 18338, 18857, 37714, 63547, 100859, 127094, 201718, 207427, 414854, 999421, 1998842, 10993631, 21987262]

約数ペア:

[(1, 21987262), (2, 10993631), (11, 1998842), (22, 999421), (53, 414854), (106, 207427), (109, 201718), (173, 127094), (218, 100859), (346, 63547), (583, 37714), (1166, 18857), (1199, 18338), (1903, 11554), (2398, 9169), (3806, 5777)]