21046672

素因数分解:

$2^4\times {\mathrm{71}}^1\times {\mathrm{97}}^1\times {\mathrm{191}}^1$

素因数の和:367

約数の個数: 40

約数和(自身を含む): 41997312

約数和(自身を除く): 20950640

約数列:

[1, 2, 4, 8, 16, 71, 97, 142, 191, 194, 284, 382, 388, 568, 764, 776, 1136, 1528, 1552, 3056, 6887, 13561, 13774, 18527, 27122, 27548, 37054, 54244, 55096, 74108, 108488, 110192, 148216, 216976, 296432, 1315417, 2630834, 5261668, 10523336, 21046672]

約数ペア:

[(1, 21046672), (2, 10523336), (4, 5261668), (8, 2630834), (16, 1315417), (71, 296432), (97, 216976), (142, 148216), (191, 110192), (194, 108488), (284, 74108), (382, 55096), (388, 54244), (568, 37054), (764, 27548), (776, 27122), (1136, 18527), (1528, 13774), (1552, 13561), (3056, 6887)]