21121155

素因数分解:

$3^4\times 5^1\times {\mathrm{11}}^2\times {\mathrm{431}}^1$

素因数の和:470

約数の個数: 60

約数和(自身を含む): 41713056

約数和(自身を除く): 20591901

約数列:

[1, 3, 5, 9, 11, 15, 27, 33, 45, 55, 81, 99, 121, 135, 165, 297, 363, 405, 431, 495, 605, 891, 1089, 1293, 1485, 1815, 2155, 3267, 3879, 4455, 4741, 5445, 6465, 9801, 11637, 14223, 16335, 19395, 23705, 34911, 42669, 49005, 52151, 58185, 71115, 128007, 156453, 174555, 213345, 260755, 384021, 469359, 640035, 782265, 1408077, 1920105, 2346795, 4224231, 7040385, 21121155]

約数ペア:

[(1, 21121155), (3, 7040385), (5, 4224231), (9, 2346795), (11, 1920105), (15, 1408077), (27, 782265), (33, 640035), (45, 469359), (55, 384021), (81, 260755), (99, 213345), (121, 174555), (135, 156453), (165, 128007), (297, 71115), (363, 58185), (405, 52151), (431, 49005), (495, 42669), (605, 34911), (891, 23705), (1089, 19395), (1293, 16335), (1485, 14223), (1815, 11637), (2155, 9801), (3267, 6465), (3879, 5445), (4455, 4741)]