21097725

素因数分解:

$3^1\times 5^2\times {\mathrm{11}}^1\times {\mathrm{107}}^1\times {\mathrm{239}}^1$

素因数の和:370

約数の個数: 48

約数和(自身を含む): 38568960

約数和(自身を除く): 17471235

約数列:

[1, 3, 5, 11, 15, 25, 33, 55, 75, 107, 165, 239, 275, 321, 535, 717, 825, 1177, 1195, 1605, 2629, 2675, 3531, 3585, 5885, 5975, 7887, 8025, 13145, 17655, 17925, 25573, 29425, 39435, 65725, 76719, 88275, 127865, 197175, 281303, 383595, 639325, 843909, 1406515, 1917975, 4219545, 7032575, 21097725]

約数ペア:

[(1, 21097725), (3, 7032575), (5, 4219545), (11, 1917975), (15, 1406515), (25, 843909), (33, 639325), (55, 383595), (75, 281303), (107, 197175), (165, 127865), (239, 88275), (275, 76719), (321, 65725), (535, 39435), (717, 29425), (825, 25573), (1177, 17925), (1195, 17655), (1605, 13145), (2629, 8025), (2675, 7887), (3531, 5975), (3585, 5885)]