217445949

素因数分解:

$3^2\times 7^1\times {\mathrm{71}}^1\times {\mathrm{173}}^1\times {\mathrm{281}}^1$

素因数の和:538

約数の個数: 48

約数和(自身を含む): 367421184

約数和(自身を除く): 149975235

約数列:

[1, 3, 7, 9, 21, 63, 71, 173, 213, 281, 497, 519, 639, 843, 1211, 1491, 1557, 1967, 2529, 3633, 4473, 5901, 10899, 12283, 17703, 19951, 36849, 48613, 59853, 85981, 110547, 139657, 145839, 179559, 257943, 340291, 418971, 437517, 773829, 1020873, 1256913, 3062619, 3451523, 10354569, 24160661, 31063707, 72481983, 217445949]

約数ペア:

[(1, 217445949), (3, 72481983), (7, 31063707), (9, 24160661), (21, 10354569), (63, 3451523), (71, 3062619), (173, 1256913), (213, 1020873), (281, 773829), (497, 437517), (519, 418971), (639, 340291), (843, 257943), (1211, 179559), (1491, 145839), (1557, 139657), (1967, 110547), (2529, 85981), (3633, 59853), (4473, 48613), (5901, 36849), (10899, 19951), (12283, 17703)]