21070899

素因数分解:

$3^2\times {\mathrm{47}}^1\times {\mathrm{109}}^1\times {\mathrm{457}}^1$

素因数の和:619

約数の個数: 24

約数和(自身を含む): 31437120

約数和(自身を除く): 10366221

約数列:

[1, 3, 9, 47, 109, 141, 327, 423, 457, 981, 1371, 4113, 5123, 15369, 21479, 46107, 49813, 64437, 149439, 193311, 448317, 2341211, 7023633, 21070899]

約数ペア:

[(1, 21070899), (3, 7023633), (9, 2341211), (47, 448317), (109, 193311), (141, 149439), (327, 64437), (423, 49813), (457, 46107), (981, 21479), (1371, 15369), (4113, 5123)]