21257258

素因数分解:

$2^1\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{71}}^1\times {\mathrm{439}}^1$

素因数の和:554

約数の個数: 32

約数和(自身を含む): 36495360

約数和(自身を除く): 15238102

約数列:

[1, 2, 11, 22, 31, 62, 71, 142, 341, 439, 682, 781, 878, 1562, 2201, 4402, 4829, 9658, 13609, 24211, 27218, 31169, 48422, 62338, 149699, 299398, 342859, 685718, 966239, 1932478, 10628629, 21257258]

約数ペア:

[(1, 21257258), (2, 10628629), (11, 1932478), (22, 966239), (31, 685718), (62, 342859), (71, 299398), (142, 149699), (341, 62338), (439, 48422), (682, 31169), (781, 27218), (878, 24211), (1562, 13609), (2201, 9658), (4402, 4829)]