21080220

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{53}}^1\times {\mathrm{947}}^1$

素因数の和:1019

約数の個数: 96

約数和(自身を含む): 68802048

約数和(自身を除く): 47721828

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 53, 60, 70, 84, 105, 106, 140, 159, 210, 212, 265, 318, 371, 420, 530, 636, 742, 795, 947, 1060, 1113, 1484, 1590, 1855, 1894, 2226, 2841, 3180, 3710, 3788, 4452, 4735, 5565, 5682, 6629, 7420, 9470, 11130, 11364, 13258, 14205, 18940, 19887, 22260, 26516, 28410, 33145, 39774, 50191, 56820, 66290, 79548, 99435, 100382, 132580, 150573, 198870, 200764, 250955, 301146, 351337, 397740, 501910, 602292, 702674, 752865, 1003820, 1054011, 1405348, 1505730, 1756685, 2108022, 3011460, 3513370, 4216044, 5270055, 7026740, 10540110, 21080220]

約数ペア:

[(1, 21080220), (2, 10540110), (3, 7026740), (4, 5270055), (5, 4216044), (6, 3513370), (7, 3011460), (10, 2108022), (12, 1756685), (14, 1505730), (15, 1405348), (20, 1054011), (21, 1003820), (28, 752865), (30, 702674), (35, 602292), (42, 501910), (53, 397740), (60, 351337), (70, 301146), (84, 250955), (105, 200764), (106, 198870), (140, 150573), (159, 132580), (210, 100382), (212, 99435), (265, 79548), (318, 66290), (371, 56820), (420, 50191), (530, 39774), (636, 33145), (742, 28410), (795, 26516), (947, 22260), (1060, 19887), (1113, 18940), (1484, 14205), (1590, 13258), (1855, 11364), (1894, 11130), (2226, 9470), (2841, 7420), (3180, 6629), (3710, 5682), (3788, 5565), (4452, 4735)]