21838707

素因数分解:

$3^3\times {\mathrm{11}}^1\times {\mathrm{23}}^2\times {\mathrm{139}}^1$

素因数の和:205

約数の個数: 48

約数和(自身を含む): 37161600

約数和(自身を除く): 15322893

約数列:

[1, 3, 9, 11, 23, 27, 33, 69, 99, 139, 207, 253, 297, 417, 529, 621, 759, 1251, 1529, 1587, 2277, 3197, 3753, 4587, 4761, 5819, 6831, 9591, 13761, 14283, 17457, 28773, 35167, 41283, 52371, 73531, 86319, 105501, 157113, 220593, 316503, 661779, 808841, 949509, 1985337, 2426523, 7279569, 21838707]

約数ペア:

[(1, 21838707), (3, 7279569), (9, 2426523), (11, 1985337), (23, 949509), (27, 808841), (33, 661779), (69, 316503), (99, 220593), (139, 157113), (207, 105501), (253, 86319), (297, 73531), (417, 52371), (529, 41283), (621, 35167), (759, 28773), (1251, 17457), (1529, 14283), (1587, 13761), (2277, 9591), (3197, 6831), (3753, 5819), (4587, 4761)]