21689943

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{41}}^2$

素因数の和:136

約数の個数: 48

約数和(自身を含む): 35728128

約数和(自身を除く): 14038185

約数列:

[1, 3, 11, 17, 23, 33, 41, 51, 69, 123, 187, 253, 391, 451, 561, 697, 759, 943, 1173, 1353, 1681, 2091, 2829, 4301, 5043, 7667, 10373, 12903, 16031, 18491, 23001, 28577, 31119, 38663, 48093, 55473, 85731, 115989, 176341, 314347, 425293, 529023, 657271, 943041, 1275879, 1971813, 7229981, 21689943]

約数ペア:

[(1, 21689943), (3, 7229981), (11, 1971813), (17, 1275879), (23, 943041), (33, 657271), (41, 529023), (51, 425293), (69, 314347), (123, 176341), (187, 115989), (253, 85731), (391, 55473), (451, 48093), (561, 38663), (697, 31119), (759, 28577), (943, 23001), (1173, 18491), (1353, 16031), (1681, 12903), (2091, 10373), (2829, 7667), (4301, 5043)]