21406287

素因数分解:

$3^1\times 7^3\times {\mathrm{71}}^1\times {\mathrm{293}}^1$

素因数の和:388

約数の個数: 32

約数和(自身を含む): 33868800

約数和(自身を除く): 12462513

約数列:

[1, 3, 7, 21, 49, 71, 147, 213, 293, 343, 497, 879, 1029, 1491, 2051, 3479, 6153, 10437, 14357, 20803, 24353, 43071, 62409, 73059, 100499, 145621, 301497, 436863, 1019347, 3058041, 7135429, 21406287]

約数ペア:

[(1, 21406287), (3, 7135429), (7, 3058041), (21, 1019347), (49, 436863), (71, 301497), (147, 145621), (213, 100499), (293, 73059), (343, 62409), (497, 43071), (879, 24353), (1029, 20803), (1491, 14357), (2051, 10437), (3479, 6153)]