21791518

素因数分解:

$2^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{61}}^1\times {\mathrm{79}}^1$

素因数の和:185

約数の個数: 64

約数和(自身を含む): 42854400

約数和(自身を除く): 21062882

約数列:

[1, 2, 7, 14, 17, 19, 34, 38, 61, 79, 119, 122, 133, 158, 238, 266, 323, 427, 553, 646, 854, 1037, 1106, 1159, 1343, 1501, 2074, 2261, 2318, 2686, 3002, 4522, 4819, 7259, 8113, 9401, 9638, 10507, 14518, 16226, 18802, 19703, 21014, 25517, 33733, 39406, 51034, 67466, 81923, 91561, 137921, 163846, 178619, 183122, 275842, 357238, 573461, 640927, 1146922, 1281854, 1556537, 3113074, 10895759, 21791518]

約数ペア:

[(1, 21791518), (2, 10895759), (7, 3113074), (14, 1556537), (17, 1281854), (19, 1146922), (34, 640927), (38, 573461), (61, 357238), (79, 275842), (119, 183122), (122, 178619), (133, 163846), (158, 137921), (238, 91561), (266, 81923), (323, 67466), (427, 51034), (553, 39406), (646, 33733), (854, 25517), (1037, 21014), (1106, 19703), (1159, 18802), (1343, 16226), (1501, 14518), (2074, 10507), (2261, 9638), (2318, 9401), (2686, 8113), (3002, 7259), (4522, 4819)]