19712931

素因数分解:

$3^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{107}}^1\times {\mathrm{283}}^1$

素因数の和:431

約数の個数: 32

約数和(自身を含む): 31408128

約数和(自身を除く): 11695197

約数列:

[1, 3, 7, 21, 31, 93, 107, 217, 283, 321, 651, 749, 849, 1981, 2247, 3317, 5943, 8773, 9951, 23219, 26319, 30281, 61411, 69657, 90843, 184233, 211967, 635901, 938711, 2816133, 6570977, 19712931]

約数ペア:

[(1, 19712931), (3, 6570977), (7, 2816133), (21, 938711), (31, 635901), (93, 211967), (107, 184233), (217, 90843), (283, 69657), (321, 61411), (651, 30281), (749, 26319), (849, 23219), (1981, 9951), (2247, 8773), (3317, 5943)]