21129339

素因数分解:

$3^1\times 7^2\times {\mathrm{11}}^1\times {\mathrm{73}}^1\times {\mathrm{179}}^1$

素因数の和:280

約数の個数: 48

約数和(自身を含む): 36443520

約数和(自身を除く): 15314181

約数列:

[1, 3, 7, 11, 21, 33, 49, 73, 77, 147, 179, 219, 231, 511, 537, 539, 803, 1253, 1533, 1617, 1969, 2409, 3577, 3759, 5621, 5907, 8771, 10731, 13067, 13783, 16863, 26313, 39201, 39347, 41349, 91469, 96481, 118041, 143737, 274407, 289443, 431211, 640283, 1006159, 1920849, 3018477, 7043113, 21129339]

約数ペア:

[(1, 21129339), (3, 7043113), (7, 3018477), (11, 1920849), (21, 1006159), (33, 640283), (49, 431211), (73, 289443), (77, 274407), (147, 143737), (179, 118041), (219, 96481), (231, 91469), (511, 41349), (537, 39347), (539, 39201), (803, 26313), (1253, 16863), (1533, 13783), (1617, 13067), (1969, 10731), (2409, 8771), (3577, 5907), (3759, 5621)]