81971379

素因数分解:

$3^3\times 7^1\times {\mathrm{23}}^1\times {\mathrm{109}}^1\times {\mathrm{173}}^1$

素因数の和:321

約数の個数: 64

約数和(自身を含む): 146995200

約数和(自身を除く): 65023821

約数列:

[1, 3, 7, 9, 21, 23, 27, 63, 69, 109, 161, 173, 189, 207, 327, 483, 519, 621, 763, 981, 1211, 1449, 1557, 2289, 2507, 2943, 3633, 3979, 4347, 4671, 6867, 7521, 10899, 11937, 17549, 18857, 20601, 22563, 27853, 32697, 35811, 52647, 56571, 67689, 83559, 107433, 131999, 157941, 169713, 250677, 395997, 433711, 473823, 509139, 752031, 1187991, 1301133, 3035977, 3563973, 3903399, 9107931, 11710197, 27323793, 81971379]

約数ペア:

[(1, 81971379), (3, 27323793), (7, 11710197), (9, 9107931), (21, 3903399), (23, 3563973), (27, 3035977), (63, 1301133), (69, 1187991), (109, 752031), (161, 509139), (173, 473823), (189, 433711), (207, 395997), (327, 250677), (483, 169713), (519, 157941), (621, 131999), (763, 107433), (981, 83559), (1211, 67689), (1449, 56571), (1557, 52647), (2289, 35811), (2507, 32697), (2943, 27853), (3633, 22563), (3979, 20601), (4347, 18857), (4671, 17549), (6867, 11937), (7521, 10899)]