21175557

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{41}}^2$

素因数の和:134

約数の個数: 48

約数和(自身を含む): 34735680

約数和(自身を除く): 13560123

約数列:

[1, 3, 13, 17, 19, 39, 41, 51, 57, 123, 221, 247, 323, 533, 663, 697, 741, 779, 969, 1599, 1681, 2091, 2337, 4199, 5043, 9061, 10127, 12597, 13243, 21853, 27183, 28577, 30381, 31939, 39729, 65559, 85731, 95817, 172159, 371501, 415207, 516477, 542963, 1114503, 1245621, 1628889, 7058519, 21175557]

約数ペア:

[(1, 21175557), (3, 7058519), (13, 1628889), (17, 1245621), (19, 1114503), (39, 542963), (41, 516477), (51, 415207), (57, 371501), (123, 172159), (221, 95817), (247, 85731), (323, 65559), (533, 39729), (663, 31939), (697, 30381), (741, 28577), (779, 27183), (969, 21853), (1599, 13243), (1681, 12597), (2091, 10127), (2337, 9061), (4199, 5043)]