21018231

素因数分解:

$3^3\times {\mathrm{13}}^1\times {\mathrm{233}}^1\times {\mathrm{257}}^1$

素因数の和:512

約数の個数: 32

約数和(自身を含む): 33808320

約数和(自身を除く): 12790089

約数列:

[1, 3, 9, 13, 27, 39, 117, 233, 257, 351, 699, 771, 2097, 2313, 3029, 3341, 6291, 6939, 9087, 10023, 27261, 30069, 59881, 81783, 90207, 179643, 538929, 778453, 1616787, 2335359, 7006077, 21018231]

約数ペア:

[(1, 21018231), (3, 7006077), (9, 2335359), (13, 1616787), (27, 778453), (39, 538929), (117, 179643), (233, 90207), (257, 81783), (351, 59881), (699, 30069), (771, 27261), (2097, 10023), (2313, 9087), (3029, 6939), (3341, 6291)]