21521775

素因数分解:

$3^1\times 5^2\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{1373}}^1$

素因数の和:1416

約数の個数: 48

約数和(自身を含む): 40890240

約数和(自身を除く): 19368465

約数列:

[1, 3, 5, 11, 15, 19, 25, 33, 55, 57, 75, 95, 165, 209, 275, 285, 475, 627, 825, 1045, 1373, 1425, 3135, 4119, 5225, 6865, 15103, 15675, 20595, 26087, 34325, 45309, 75515, 78261, 102975, 130435, 226545, 286957, 377575, 391305, 652175, 860871, 1132725, 1434785, 1956525, 4304355, 7173925, 21521775]

約数ペア:

[(1, 21521775), (3, 7173925), (5, 4304355), (11, 1956525), (15, 1434785), (19, 1132725), (25, 860871), (33, 652175), (55, 391305), (57, 377575), (75, 286957), (95, 226545), (165, 130435), (209, 102975), (275, 78261), (285, 75515), (475, 45309), (627, 34325), (825, 26087), (1045, 20595), (1373, 15675), (1425, 15103), (3135, 6865), (4119, 5225)]