21000691761

素因数分解:

$3^1\times 7^1\times {\mathrm{71}}^1\times {\mathrm{911}}^1\times {\mathrm{15461}}^1$

素因数の和:16453

約数の個数: 32

約数和(自身を含む): 32489496576

約数和(自身を除く): 11488804815

約数列:

[1, 3, 7, 21, 71, 213, 497, 911, 1491, 2733, 6377, 15461, 19131, 46383, 64681, 108227, 194043, 324681, 452767, 1097731, 1358301, 3293193, 7684117, 14084971, 23052351, 42254913, 98594797, 295784391, 1000032941, 3000098823, 7000230587, 21000691761]

約数ペア:

[(1, 21000691761), (3, 7000230587), (7, 3000098823), (21, 1000032941), (71, 295784391), (213, 98594797), (497, 42254913), (911, 23052351), (1491, 14084971), (2733, 7684117), (6377, 3293193), (15461, 1358301), (19131, 1097731), (46383, 452767), (64681, 324681), (108227, 194043)]