21257973

素因数分解:

$3^2\times {\mathrm{11}}^1\times {\mathrm{17}}^2\times {\mathrm{743}}^1$

素因数の和:794

約数の個数: 36

約数和(自身を含む): 35631648

約数和(自身を除く): 14373675

約数列:

[1, 3, 9, 11, 17, 33, 51, 99, 153, 187, 289, 561, 743, 867, 1683, 2229, 2601, 3179, 6687, 8173, 9537, 12631, 24519, 28611, 37893, 73557, 113679, 138941, 214727, 416823, 644181, 1250469, 1932543, 2361997, 7085991, 21257973]

約数ペア:

[(1, 21257973), (3, 7085991), (9, 2361997), (11, 1932543), (17, 1250469), (33, 644181), (51, 416823), (99, 214727), (153, 138941), (187, 113679), (289, 73557), (561, 37893), (743, 28611), (867, 24519), (1683, 12631), (2229, 9537), (2601, 8173), (3179, 6687)]