20121795

素因数分解:

$3^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{29}}^1\times {\mathrm{907}}^1$

素因数の和:964

約数の個数: 48

約数和(自身を含む): 38244960

約数和(自身を除く): 18123165

約数列:

[1, 3, 5, 9, 15, 17, 29, 45, 51, 85, 87, 145, 153, 255, 261, 435, 493, 765, 907, 1305, 1479, 2465, 2721, 4437, 4535, 7395, 8163, 13605, 15419, 22185, 26303, 40815, 46257, 77095, 78909, 131515, 138771, 231285, 236727, 394545, 447151, 693855, 1183635, 1341453, 2235755, 4024359, 6707265, 20121795]

約数ペア:

[(1, 20121795), (3, 6707265), (5, 4024359), (9, 2235755), (15, 1341453), (17, 1183635), (29, 693855), (45, 447151), (51, 394545), (85, 236727), (87, 231285), (145, 138771), (153, 131515), (255, 78909), (261, 77095), (435, 46257), (493, 40815), (765, 26303), (907, 22185), (1305, 15419), (1479, 13605), (2465, 8163), (2721, 7395), (4437, 4535)]