21721908

素因数分解:

$2^2\times 3^1\times {\mathrm{13}}^2\times {\mathrm{10711}}^1$

素因数の和:10744

約数の個数: 36

約数和(自身を含む): 54888288

約数和(自身を除く): 33166380

約数列:

[1, 2, 3, 4, 6, 12, 13, 26, 39, 52, 78, 156, 169, 338, 507, 676, 1014, 2028, 10711, 21422, 32133, 42844, 64266, 128532, 139243, 278486, 417729, 556972, 835458, 1670916, 1810159, 3620318, 5430477, 7240636, 10860954, 21721908]

約数ペア:

[(1, 21721908), (2, 10860954), (3, 7240636), (4, 5430477), (6, 3620318), (12, 1810159), (13, 1670916), (26, 835458), (39, 556972), (52, 417729), (78, 278486), (156, 139243), (169, 128532), (338, 64266), (507, 42844), (676, 32133), (1014, 21422), (2028, 10711)]