21864789

素因数分解:

$3^3\times {\mathrm{23}}^1\times {\mathrm{137}}^1\times {\mathrm{257}}^1$

素因数の和:426

約数の個数: 32

約数和(自身を含む): 34179840

約数和(自身を除く): 12315051

約数列:

[1, 3, 9, 23, 27, 69, 137, 207, 257, 411, 621, 771, 1233, 2313, 3151, 3699, 5911, 6939, 9453, 17733, 28359, 35209, 53199, 85077, 105627, 159597, 316881, 809807, 950643, 2429421, 7288263, 21864789]

約数ペア:

[(1, 21864789), (3, 7288263), (9, 2429421), (23, 950643), (27, 809807), (69, 316881), (137, 159597), (207, 105627), (257, 85077), (411, 53199), (621, 35209), (771, 28359), (1233, 17733), (2313, 9453), (3151, 6939), (3699, 5911)]