20804700

素因数分解:

$2^2\times 3^1\times 5^2\times 7^1\times {\mathrm{9907}}^1$

素因数の和:9931

約数の個数: 72

約数和(自身を含む): 68801152

約数和(自身を除く): 47996452

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 25, 28, 30, 35, 42, 50, 60, 70, 75, 84, 100, 105, 140, 150, 175, 210, 300, 350, 420, 525, 700, 1050, 2100, 9907, 19814, 29721, 39628, 49535, 59442, 69349, 99070, 118884, 138698, 148605, 198140, 208047, 247675, 277396, 297210, 346745, 416094, 495350, 594420, 693490, 743025, 832188, 990700, 1040235, 1386980, 1486050, 1733725, 2080470, 2972100, 3467450, 4160940, 5201175, 6934900, 10402350, 20804700]

約数ペア:

[(1, 20804700), (2, 10402350), (3, 6934900), (4, 5201175), (5, 4160940), (6, 3467450), (7, 2972100), (10, 2080470), (12, 1733725), (14, 1486050), (15, 1386980), (20, 1040235), (21, 990700), (25, 832188), (28, 743025), (30, 693490), (35, 594420), (42, 495350), (50, 416094), (60, 346745), (70, 297210), (75, 277396), (84, 247675), (100, 208047), (105, 198140), (140, 148605), (150, 138698), (175, 118884), (210, 99070), (300, 69349), (350, 59442), (420, 49535), (525, 39628), (700, 29721), (1050, 19814), (2100, 9907)]