21661724

素因数分解:

$2^2\times 7^2\times {\mathrm{29}}^1\times {\mathrm{37}}^1\times {\mathrm{103}}^1$

素因数の和:187

約数の個数: 72

約数和(自身を含む): 47305440

約数和(自身を除く): 25643716

約数列:

[1, 2, 4, 7, 14, 28, 29, 37, 49, 58, 74, 98, 103, 116, 148, 196, 203, 206, 259, 406, 412, 518, 721, 812, 1036, 1073, 1421, 1442, 1813, 2146, 2842, 2884, 2987, 3626, 3811, 4292, 5047, 5684, 5974, 7252, 7511, 7622, 10094, 11948, 15022, 15244, 20188, 20909, 26677, 30044, 41818, 52577, 53354, 83636, 105154, 106708, 110519, 146363, 186739, 210308, 221038, 292726, 373478, 442076, 585452, 746956, 773633, 1547266, 3094532, 5415431, 10830862, 21661724]

約数ペア:

[(1, 21661724), (2, 10830862), (4, 5415431), (7, 3094532), (14, 1547266), (28, 773633), (29, 746956), (37, 585452), (49, 442076), (58, 373478), (74, 292726), (98, 221038), (103, 210308), (116, 186739), (148, 146363), (196, 110519), (203, 106708), (206, 105154), (259, 83636), (406, 53354), (412, 52577), (518, 41818), (721, 30044), (812, 26677), (1036, 20909), (1073, 20188), (1421, 15244), (1442, 15022), (1813, 11948), (2146, 10094), (2842, 7622), (2884, 7511), (2987, 7252), (3626, 5974), (3811, 5684), (4292, 5047)]