21105903

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^2\times {\mathrm{19}}^1\times {\mathrm{313}}^1$

素因数の和:368

約数の個数: 48

約数和(自身を含む): 36775680

約数和(自身を除く): 15669777

約数列:

[1, 3, 7, 13, 19, 21, 39, 57, 91, 133, 169, 247, 273, 313, 399, 507, 741, 939, 1183, 1729, 2191, 3211, 3549, 4069, 5187, 5947, 6573, 9633, 12207, 17841, 22477, 28483, 41629, 52897, 67431, 77311, 85449, 124887, 158691, 231933, 370279, 541177, 1005043, 1110837, 1623531, 3015129, 7035301, 21105903]

約数ペア:

[(1, 21105903), (3, 7035301), (7, 3015129), (13, 1623531), (19, 1110837), (21, 1005043), (39, 541177), (57, 370279), (91, 231933), (133, 158691), (169, 124887), (247, 85449), (273, 77311), (313, 67431), (399, 52897), (507, 41629), (741, 28483), (939, 22477), (1183, 17841), (1729, 12207), (2191, 9633), (3211, 6573), (3549, 5947), (4069, 5187)]