31639959

素因数分解:

$3^2\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{43}}^1\times {\mathrm{331}}^1$

素因数の和:412

約数の個数: 48

約数和(自身を含む): 53173120

約数和(自身を除く): 21533161

約数列:

[1, 3, 9, 13, 19, 39, 43, 57, 117, 129, 171, 247, 331, 387, 559, 741, 817, 993, 1677, 2223, 2451, 2979, 4303, 5031, 6289, 7353, 10621, 12909, 14233, 18867, 31863, 38727, 42699, 56601, 81757, 95589, 128097, 185029, 245271, 270427, 555087, 735813, 811281, 1665261, 2433843, 3515551, 10546653, 31639959]

約数ペア:

[(1, 31639959), (3, 10546653), (9, 3515551), (13, 2433843), (19, 1665261), (39, 811281), (43, 735813), (57, 555087), (117, 270427), (129, 245271), (171, 185029), (247, 128097), (331, 95589), (387, 81757), (559, 56601), (741, 42699), (817, 38727), (993, 31863), (1677, 18867), (2223, 14233), (2451, 12909), (2979, 10621), (4303, 7353), (5031, 6289)]