21378423

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{29}}^1\times {\mathrm{89}}^1\times {\mathrm{251}}^1$

素因数の和:383

約数の個数: 32

約数和(自身を含む): 32659200

約数和(自身を除く): 11280777

約数列:

[1, 3, 11, 29, 33, 87, 89, 251, 267, 319, 753, 957, 979, 2581, 2761, 2937, 7279, 7743, 8283, 21837, 22339, 28391, 67017, 80069, 85173, 240207, 245729, 647831, 737187, 1943493, 7126141, 21378423]

約数ペア:

[(1, 21378423), (3, 7126141), (11, 1943493), (29, 737187), (33, 647831), (87, 245729), (89, 240207), (251, 85173), (267, 80069), (319, 67017), (753, 28391), (957, 22339), (979, 21837), (2581, 8283), (2761, 7743), (2937, 7279)]