640668996

素因数分解:

$2^2\times 3^2\times {\mathrm{11}}^1\times {\mathrm{389}}^1\times {\mathrm{4159}}^1$

素因数の和:4569

約数の個数: 72

約数和(自身を含む): 1771660800

約数和(自身を除く): 1130991804

約数列:

[1, 2, 3, 4, 6, 9, 11, 12, 18, 22, 33, 36, 44, 66, 99, 132, 198, 389, 396, 778, 1167, 1556, 2334, 3501, 4159, 4279, 4668, 7002, 8318, 8558, 12477, 12837, 14004, 16636, 17116, 24954, 25674, 37431, 38511, 45749, 49908, 51348, 74862, 77022, 91498, 137247, 149724, 154044, 182996, 274494, 411741, 548988, 823482, 1617851, 1646964, 3235702, 4853553, 6471404, 9707106, 14560659, 17796361, 19414212, 29121318, 35592722, 53389083, 58242636, 71185444, 106778166, 160167249, 213556332, 320334498, 640668996]

約数ペア:

[(1, 640668996), (2, 320334498), (3, 213556332), (4, 160167249), (6, 106778166), (9, 71185444), (11, 58242636), (12, 53389083), (18, 35592722), (22, 29121318), (33, 19414212), (36, 17796361), (44, 14560659), (66, 9707106), (99, 6471404), (132, 4853553), (198, 3235702), (389, 1646964), (396, 1617851), (778, 823482), (1167, 548988), (1556, 411741), (2334, 274494), (3501, 182996), (4159, 154044), (4279, 149724), (4668, 137247), (7002, 91498), (8318, 77022), (8558, 74862), (12477, 51348), (12837, 49908), (14004, 45749), (16636, 38511), (17116, 37431), (24954, 25674)]