21557853

素因数分解:

$3^3\times {\mathrm{17}}^1\times {\mathrm{67}}^1\times {\mathrm{701}}^1$

素因数の和:794

約数の個数: 32

約数和(自身を含む): 34369920

約数和(自身を除く): 12812067

約数列:

[1, 3, 9, 17, 27, 51, 67, 153, 201, 459, 603, 701, 1139, 1809, 2103, 3417, 6309, 10251, 11917, 18927, 30753, 35751, 46967, 107253, 140901, 321759, 422703, 798439, 1268109, 2395317, 7185951, 21557853]

約数ペア:

[(1, 21557853), (3, 7185951), (9, 2395317), (17, 1268109), (27, 798439), (51, 422703), (67, 321759), (153, 140901), (201, 107253), (459, 46967), (603, 35751), (701, 30753), (1139, 18927), (1809, 11917), (2103, 10251), (3417, 6309)]