21612897

素因数分解:

$3^2\times {\mathrm{71}}^1\times {\mathrm{149}}^1\times {\mathrm{227}}^1$

素因数の和:453

約数の個数: 24

約数和(自身を含む): 32011200

約数和(自身を除く): 10398303

約数列:

[1, 3, 9, 71, 149, 213, 227, 447, 639, 681, 1341, 2043, 10579, 16117, 31737, 33823, 48351, 95211, 101469, 145053, 304407, 2401433, 7204299, 21612897]

約数ペア:

[(1, 21612897), (3, 7204299), (9, 2401433), (71, 304407), (149, 145053), (213, 101469), (227, 95211), (447, 48351), (639, 33823), (681, 31737), (1341, 16117), (2043, 10579)]