81663393

素因数分解:

$3^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{47}}^1\times {\mathrm{157}}^1$

素因数の和:262

約数の個数: 64

約数和(自身を含む): 139788288

約数和(自身を除く): 58124895

約数列:

[1, 3, 7, 17, 21, 31, 47, 51, 93, 119, 141, 157, 217, 329, 357, 471, 527, 651, 799, 987, 1099, 1457, 1581, 2397, 2669, 3297, 3689, 4371, 4867, 5593, 7379, 8007, 10199, 11067, 14601, 16779, 18683, 22137, 24769, 30597, 34069, 51653, 56049, 74307, 82739, 102207, 125443, 154959, 173383, 228749, 248217, 376329, 520149, 579173, 686247, 878101, 1601243, 1737519, 2634303, 3888733, 4803729, 11666199, 27221131, 81663393]

約数ペア:

[(1, 81663393), (3, 27221131), (7, 11666199), (17, 4803729), (21, 3888733), (31, 2634303), (47, 1737519), (51, 1601243), (93, 878101), (119, 686247), (141, 579173), (157, 520149), (217, 376329), (329, 248217), (357, 228749), (471, 173383), (527, 154959), (651, 125443), (799, 102207), (987, 82739), (1099, 74307), (1457, 56049), (1581, 51653), (2397, 34069), (2669, 30597), (3297, 24769), (3689, 22137), (4371, 18683), (4867, 16779), (5593, 14601), (7379, 11067), (8007, 10199)]