21243420

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{10729}}^1$

素因数の和:10755

約数の個数: 72

約数和(自身を含む): 70302960

約数和(自身を除く): 49059540

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 11, 12, 15, 18, 20, 22, 30, 33, 36, 44, 45, 55, 60, 66, 90, 99, 110, 132, 165, 180, 198, 220, 330, 396, 495, 660, 990, 1980, 10729, 21458, 32187, 42916, 53645, 64374, 96561, 107290, 118019, 128748, 160935, 193122, 214580, 236038, 321870, 354057, 386244, 472076, 482805, 590095, 643740, 708114, 965610, 1062171, 1180190, 1416228, 1770285, 1931220, 2124342, 2360380, 3540570, 4248684, 5310855, 7081140, 10621710, 21243420]

約数ペア:

[(1, 21243420), (2, 10621710), (3, 7081140), (4, 5310855), (5, 4248684), (6, 3540570), (9, 2360380), (10, 2124342), (11, 1931220), (12, 1770285), (15, 1416228), (18, 1180190), (20, 1062171), (22, 965610), (30, 708114), (33, 643740), (36, 590095), (44, 482805), (45, 472076), (55, 386244), (60, 354057), (66, 321870), (90, 236038), (99, 214580), (110, 193122), (132, 160935), (165, 128748), (180, 118019), (198, 107290), (220, 96561), (330, 64374), (396, 53645), (495, 42916), (660, 32187), (990, 21458), (1980, 10729)]