21361095

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{3989}}^1$

素因数の和:4024

約数の個数: 48

約数和(自身を含む): 44815680

約数和(自身を除く): 23454585

約数列:

[1, 3, 5, 7, 9, 15, 17, 21, 35, 45, 51, 63, 85, 105, 119, 153, 255, 315, 357, 595, 765, 1071, 1785, 3989, 5355, 11967, 19945, 27923, 35901, 59835, 67813, 83769, 139615, 179505, 203439, 251307, 339065, 418845, 474691, 610317, 1017195, 1256535, 1424073, 2373455, 3051585, 4272219, 7120365, 21361095]

約数ペア:

[(1, 21361095), (3, 7120365), (5, 4272219), (7, 3051585), (9, 2373455), (15, 1424073), (17, 1256535), (21, 1017195), (35, 610317), (45, 474691), (51, 418845), (63, 339065), (85, 251307), (105, 203439), (119, 179505), (153, 139615), (255, 83769), (315, 67813), (357, 59835), (595, 35901), (765, 27923), (1071, 19945), (1785, 11967), (3989, 5355)]