21953511

素因数分解:

$3^4\times {\mathrm{17}}^1\times {\mathrm{107}}^1\times {\mathrm{149}}^1$

素因数の和:285

約数の個数: 40

約数和(自身を含む): 35283600

約数和(自身を除く): 13330089

約数列:

[1, 3, 9, 17, 27, 51, 81, 107, 149, 153, 321, 447, 459, 963, 1341, 1377, 1819, 2533, 2889, 4023, 5457, 7599, 8667, 12069, 15943, 16371, 22797, 47829, 49113, 68391, 143487, 147339, 205173, 271031, 430461, 813093, 1291383, 2439279, 7317837, 21953511]

約数ペア:

[(1, 21953511), (3, 7317837), (9, 2439279), (17, 1291383), (27, 813093), (51, 430461), (81, 271031), (107, 205173), (149, 147339), (153, 143487), (321, 68391), (447, 49113), (459, 47829), (963, 22797), (1341, 16371), (1377, 15943), (1819, 12069), (2533, 8667), (2889, 7599), (4023, 5457)]