21049713

素因数分解:

$3^4\times {\mathrm{31}}^1\times {\mathrm{83}}^1\times {\mathrm{101}}^1$

素因数の和:227

約数の個数: 40

約数和(自身を含む): 33175296

約数和(自身を除く): 12125583

約数列:

[1, 3, 9, 27, 31, 81, 83, 93, 101, 249, 279, 303, 747, 837, 909, 2241, 2511, 2573, 2727, 3131, 6723, 7719, 8181, 8383, 9393, 23157, 25149, 28179, 69471, 75447, 84537, 208413, 226341, 253611, 259873, 679023, 779619, 2338857, 7016571, 21049713]

約数ペア:

[(1, 21049713), (3, 7016571), (9, 2338857), (27, 779619), (31, 679023), (81, 259873), (83, 253611), (93, 226341), (101, 208413), (249, 84537), (279, 75447), (303, 69471), (747, 28179), (837, 25149), (909, 23157), (2241, 9393), (2511, 8383), (2573, 8181), (2727, 7719), (3131, 6723)]