21519261

素因数分解:

$3^2\times {\mathrm{67}}^1\times {\mathrm{127}}^1\times {\mathrm{281}}^1$

素因数の和:481

約数の個数: 24

約数和(自身を含む): 31908864

約数和(自身を除く): 10389603

約数列:

[1, 3, 9, 67, 127, 201, 281, 381, 603, 843, 1143, 2529, 8509, 18827, 25527, 35687, 56481, 76581, 107061, 169443, 321183, 2391029, 7173087, 21519261]

約数ペア:

[(1, 21519261), (3, 7173087), (9, 2391029), (67, 321183), (127, 169443), (201, 107061), (281, 76581), (381, 56481), (603, 35687), (843, 25527), (1143, 18827), (2529, 8509)]