21909736

素因数分解:

$2^3\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{61}}^1\times {\mathrm{139}}^1$

素因数の和:242

約数の個数: 64

約数和(自身を含む): 46872000

約数和(自身を除く): 24962264

約数列:

[1, 2, 4, 8, 17, 19, 34, 38, 61, 68, 76, 122, 136, 139, 152, 244, 278, 323, 488, 556, 646, 1037, 1112, 1159, 1292, 2074, 2318, 2363, 2584, 2641, 4148, 4636, 4726, 5282, 8296, 8479, 9272, 9452, 10564, 16958, 18904, 19703, 21128, 33916, 39406, 44897, 67832, 78812, 89794, 144143, 157624, 161101, 179588, 288286, 322202, 359176, 576572, 644404, 1153144, 1288808, 2738717, 5477434, 10954868, 21909736]

約数ペア:

[(1, 21909736), (2, 10954868), (4, 5477434), (8, 2738717), (17, 1288808), (19, 1153144), (34, 644404), (38, 576572), (61, 359176), (68, 322202), (76, 288286), (122, 179588), (136, 161101), (139, 157624), (152, 144143), (244, 89794), (278, 78812), (323, 67832), (488, 44897), (556, 39406), (646, 33916), (1037, 21128), (1112, 19703), (1159, 18904), (1292, 16958), (2074, 10564), (2318, 9452), (2363, 9272), (2584, 8479), (2641, 8296), (4148, 5282), (4636, 4726)]