28010781

素因数分解:

$3^2\times {\mathrm{17}}^1\times {\mathrm{29}}^1\times {\mathrm{59}}^1\times {\mathrm{107}}^1$

素因数の和:218

約数の個数: 48

約数和(自身を含む): 45489600

約数和(自身を除く): 17478819

約数列:

[1, 3, 9, 17, 29, 51, 59, 87, 107, 153, 177, 261, 321, 493, 531, 963, 1003, 1479, 1711, 1819, 3009, 3103, 4437, 5133, 5457, 6313, 9027, 9309, 15399, 16371, 18939, 27927, 29087, 52751, 56817, 87261, 107321, 158253, 183077, 261783, 321963, 474759, 549231, 965889, 1647693, 3112309, 9336927, 28010781]

約数ペア:

[(1, 28010781), (3, 9336927), (9, 3112309), (17, 1647693), (29, 965889), (51, 549231), (59, 474759), (87, 321963), (107, 261783), (153, 183077), (177, 158253), (261, 107321), (321, 87261), (493, 56817), (531, 52751), (963, 29087), (1003, 27927), (1479, 18939), (1711, 16371), (1819, 15399), (3009, 9309), (3103, 9027), (4437, 6313), (5133, 5457)]