21240208

素因数分解:

$2^4\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{229}}^1$

素因数の和:296

約数の個数: 80

約数和(自身を含む): 49282560

約数和(自身を除く): 28042352

約数列:

[1, 2, 4, 8, 11, 16, 17, 22, 31, 34, 44, 62, 68, 88, 124, 136, 176, 187, 229, 248, 272, 341, 374, 458, 496, 527, 682, 748, 916, 1054, 1364, 1496, 1832, 2108, 2519, 2728, 2992, 3664, 3893, 4216, 5038, 5456, 5797, 7099, 7786, 8432, 10076, 11594, 14198, 15572, 20152, 23188, 28396, 31144, 40304, 42823, 46376, 56792, 62288, 78089, 85646, 92752, 113584, 120683, 156178, 171292, 241366, 312356, 342584, 482732, 624712, 685168, 965464, 1249424, 1327513, 1930928, 2655026, 5310052, 10620104, 21240208]

約数ペア:

[(1, 21240208), (2, 10620104), (4, 5310052), (8, 2655026), (11, 1930928), (16, 1327513), (17, 1249424), (22, 965464), (31, 685168), (34, 624712), (44, 482732), (62, 342584), (68, 312356), (88, 241366), (124, 171292), (136, 156178), (176, 120683), (187, 113584), (229, 92752), (248, 85646), (272, 78089), (341, 62288), (374, 56792), (458, 46376), (496, 42823), (527, 40304), (682, 31144), (748, 28396), (916, 23188), (1054, 20152), (1364, 15572), (1496, 14198), (1832, 11594), (2108, 10076), (2519, 8432), (2728, 7786), (2992, 7099), (3664, 5797), (3893, 5456), (4216, 5038)]