21210255

素因数分解:

$3^6\times 5^1\times {\mathrm{11}}^1\times {\mathrm{23}}^2$

素因数の和:80

約数の個数: 84

約数和(自身を含む): 43518888

約数和(自身を除く): 22308633

約数列:

[1, 3, 5, 9, 11, 15, 23, 27, 33, 45, 55, 69, 81, 99, 115, 135, 165, 207, 243, 253, 297, 345, 405, 495, 529, 621, 729, 759, 891, 1035, 1215, 1265, 1485, 1587, 1863, 2277, 2645, 2673, 3105, 3645, 3795, 4455, 4761, 5589, 5819, 6831, 7935, 8019, 9315, 11385, 13365, 14283, 16767, 17457, 20493, 23805, 27945, 29095, 34155, 40095, 42849, 52371, 61479, 71415, 83835, 87285, 102465, 128547, 157113, 184437, 214245, 261855, 307395, 385641, 471339, 642735, 785565, 922185, 1414017, 1928205, 2356695, 4242051, 7070085, 21210255]

約数ペア:

[(1, 21210255), (3, 7070085), (5, 4242051), (9, 2356695), (11, 1928205), (15, 1414017), (23, 922185), (27, 785565), (33, 642735), (45, 471339), (55, 385641), (69, 307395), (81, 261855), (99, 214245), (115, 184437), (135, 157113), (165, 128547), (207, 102465), (243, 87285), (253, 83835), (297, 71415), (345, 61479), (405, 52371), (495, 42849), (529, 40095), (621, 34155), (729, 29095), (759, 27945), (891, 23805), (1035, 20493), (1215, 17457), (1265, 16767), (1485, 14283), (1587, 13365), (1863, 11385), (2277, 9315), (2645, 8019), (2673, 7935), (3105, 6831), (3645, 5819), (3795, 5589), (4455, 4761)]