21186675

素因数分解:

$3^2\times 5^2\times {\mathrm{17}}^1\times {\mathrm{29}}^1\times {\mathrm{191}}^1$

素因数の和:253

約数の個数: 72

約数和(自身を含む): 41783040

約数和(自身を除く): 20596365

約数列:

[1, 3, 5, 9, 15, 17, 25, 29, 45, 51, 75, 85, 87, 145, 153, 191, 225, 255, 261, 425, 435, 493, 573, 725, 765, 955, 1275, 1305, 1479, 1719, 2175, 2465, 2865, 3247, 3825, 4437, 4775, 5539, 6525, 7395, 8595, 9741, 12325, 14325, 16235, 16617, 22185, 27695, 29223, 36975, 42975, 48705, 49851, 81175, 83085, 94163, 110925, 138475, 146115, 243525, 249255, 282489, 415425, 470815, 730575, 847467, 1246275, 1412445, 2354075, 4237335, 7062225, 21186675]

約数ペア:

[(1, 21186675), (3, 7062225), (5, 4237335), (9, 2354075), (15, 1412445), (17, 1246275), (25, 847467), (29, 730575), (45, 470815), (51, 415425), (75, 282489), (85, 249255), (87, 243525), (145, 146115), (153, 138475), (191, 110925), (225, 94163), (255, 83085), (261, 81175), (425, 49851), (435, 48705), (493, 42975), (573, 36975), (725, 29223), (765, 27695), (955, 22185), (1275, 16617), (1305, 16235), (1479, 14325), (1719, 12325), (2175, 9741), (2465, 8595), (2865, 7395), (3247, 6525), (3825, 5539), (4437, 4775)]