21277260

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{2749}}^1$

素因数の和:2807

約数の個数: 72

約数和(自身を含む): 66066000

約数和(自身を除く): 44788740

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 43, 45, 60, 86, 90, 129, 172, 180, 215, 258, 387, 430, 516, 645, 774, 860, 1290, 1548, 1935, 2580, 2749, 3870, 5498, 7740, 8247, 10996, 13745, 16494, 24741, 27490, 32988, 41235, 49482, 54980, 82470, 98964, 118207, 123705, 164940, 236414, 247410, 354621, 472828, 494820, 591035, 709242, 1063863, 1182070, 1418484, 1773105, 2127726, 2364140, 3546210, 4255452, 5319315, 7092420, 10638630, 21277260]

約数ペア:

[(1, 21277260), (2, 10638630), (3, 7092420), (4, 5319315), (5, 4255452), (6, 3546210), (9, 2364140), (10, 2127726), (12, 1773105), (15, 1418484), (18, 1182070), (20, 1063863), (30, 709242), (36, 591035), (43, 494820), (45, 472828), (60, 354621), (86, 247410), (90, 236414), (129, 164940), (172, 123705), (180, 118207), (215, 98964), (258, 82470), (387, 54980), (430, 49482), (516, 41235), (645, 32988), (774, 27490), (860, 24741), (1290, 16494), (1548, 13745), (1935, 10996), (2580, 8247), (2749, 7740), (3870, 5498)]