18817911

素因数分解:

$3^2\times 7^2\times {\mathrm{71}}^1\times {\mathrm{601}}^1$

素因数の和:692

約数の個数: 36

約数和(自身を含む): 32117904

約数和(自身を除く): 13299993

約数列:

[1, 3, 7, 9, 21, 49, 63, 71, 147, 213, 441, 497, 601, 639, 1491, 1803, 3479, 4207, 4473, 5409, 10437, 12621, 29449, 31311, 37863, 42671, 88347, 128013, 265041, 298697, 384039, 896091, 2090879, 2688273, 6272637, 18817911]

約数ペア:

[(1, 18817911), (3, 6272637), (7, 2688273), (9, 2090879), (21, 896091), (49, 384039), (63, 298697), (71, 265041), (147, 128013), (213, 88347), (441, 42671), (497, 37863), (601, 31311), (639, 29449), (1491, 12621), (1803, 10437), (3479, 5409), (4207, 4473)]