21513195

素因数分解:

$3^4\times 5^1\times {\mathrm{11}}^2\times {\mathrm{439}}^1$

素因数の和:478

約数の個数: 60

約数和(自身を含む): 42485520

約数和(自身を除く): 20972325

約数列:

[1, 3, 5, 9, 11, 15, 27, 33, 45, 55, 81, 99, 121, 135, 165, 297, 363, 405, 439, 495, 605, 891, 1089, 1317, 1485, 1815, 2195, 3267, 3951, 4455, 4829, 5445, 6585, 9801, 11853, 14487, 16335, 19755, 24145, 35559, 43461, 49005, 53119, 59265, 72435, 130383, 159357, 177795, 217305, 265595, 391149, 478071, 651915, 796785, 1434213, 1955745, 2390355, 4302639, 7171065, 21513195]

約数ペア:

[(1, 21513195), (3, 7171065), (5, 4302639), (9, 2390355), (11, 1955745), (15, 1434213), (27, 796785), (33, 651915), (45, 478071), (55, 391149), (81, 265595), (99, 217305), (121, 177795), (135, 159357), (165, 130383), (297, 72435), (363, 59265), (405, 53119), (439, 49005), (495, 43461), (605, 35559), (891, 24145), (1089, 19755), (1317, 16335), (1485, 14487), (1815, 11853), (2195, 9801), (3267, 6585), (3951, 5445), (4455, 4829)]