21591801

素因数分解:

$3^2\times 7^2\times {\mathrm{11}}^1\times {\mathrm{4451}}^1$

素因数の和:4482

約数の個数: 36

約数和(自身を含む): 39587184

約数和(自身を除く): 17995383

約数列:

[1, 3, 7, 9, 11, 21, 33, 49, 63, 77, 99, 147, 231, 441, 539, 693, 1617, 4451, 4851, 13353, 31157, 40059, 48961, 93471, 146883, 218099, 280413, 342727, 440649, 654297, 1028181, 1962891, 2399089, 3084543, 7197267, 21591801]

約数ペア:

[(1, 21591801), (3, 7197267), (7, 3084543), (9, 2399089), (11, 1962891), (21, 1028181), (33, 654297), (49, 440649), (63, 342727), (77, 280413), (99, 218099), (147, 146883), (231, 93471), (441, 48961), (539, 40059), (693, 31157), (1617, 13353), (4451, 4851)]