21665241

素因数分解:

$3^2\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{83}}^1\times {\mathrm{97}}^1$

素因数の和:222

約数の個数: 48

約数和(自身を含む): 35957376

約数和(自身を除く): 14292135

約数列:

[1, 3, 9, 13, 23, 39, 69, 83, 97, 117, 207, 249, 291, 299, 747, 873, 897, 1079, 1261, 1909, 2231, 2691, 3237, 3783, 5727, 6693, 8051, 9711, 11349, 17181, 20079, 24153, 24817, 29003, 72459, 74451, 87009, 104663, 185173, 223353, 261027, 313989, 555519, 941967, 1666557, 2407249, 7221747, 21665241]

約数ペア:

[(1, 21665241), (3, 7221747), (9, 2407249), (13, 1666557), (23, 941967), (39, 555519), (69, 313989), (83, 261027), (97, 223353), (117, 185173), (207, 104663), (249, 87009), (291, 74451), (299, 72459), (747, 29003), (873, 24817), (897, 24153), (1079, 20079), (1261, 17181), (1909, 11349), (2231, 9711), (2691, 8051), (3237, 6693), (3783, 5727)]